Drive assembly with annularly arranged power transistors and vehicle including the same

ABSTRACT

The present disclosure relates to the field of new energy, and provides a drive assembly with annularly arranged power transistors and a vehicle including the same. The drive assembly includes a housing, a motor controller, a rotor, and a stator, wherein an outer wall of the housing is provided with a liquid cooling channel including a motor cooling groove located on an outer wall of a motor mounting chamber and a controller cooling groove located on an outer wall of a controller mounting chamber that communicate with each other, the motor controller includes a circuit board assembly and multiple power transistors, and the multiple power transistors are provided at an outer circumference of the circuit board assembly, and are electrically connected with the circuit board assembly. The multiple power transistors are evenly distributed circumferentially, thereby realizing integrated liquid cooling and improving heat dissipation efficiency.

CROSS REFERENCE TO RELATED APPLICATIONS

The present disclosure is a Continuation Application of PCT ApplicationNo. PCT/CN2020/128919 filed on Nov. 16, 2020, which claims priorities toChinese Patent Application Nos. CN201911247127.2, CN201911247126.8,CN201911246892.2, CN201911246844.3, CN201911247025.0, CN201922178663.3,CN201922178661.4, CN201922178480.1, CN201922178476.5, CN201922180773.3,and CN201922178390.2, filed on Dec. 6, 2019, the entire disclosures ofwhich are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to the field of new energy, and inparticular to a drive assembly with annularly arranged powertransistors, and a vehicle including the same.

BACKGROUND

New energy vehicles are environmentally friendly and low-pollutingbecause they do not use gasoline or diesel as fuel to produce power.With the vigorous promotion of new energy power generation technologiesusing water energy, wind energy, solar energy, and nuclear energy, newenergy vehicles are gradually promoted. There are various types of newenergy vehicles, including new energy electric cars, new energy electricbuses, new energy electric trucks, new energy electric cleaningvehicles, new energy electric rail vehicles, new energy electric flyingvehicles, and new energy electric shipping vehicles.

The new energy vehicle is generally equipped with batteries, a motorcontroller, a motor and power generation devices. Power transistors inthe motor controller receive direct current (DC) output from thebattery, and invert the DC into alternating current (AC) for outputtingto the motor. The motor outputs a rotational driving force to drive thepower generation devices, such as wheels and blades, thereby driving thevehicle to travel.

The drive assembly (i.e. the motor and the motor controller) in thevehicle can be integrated to reduce its footprint, so as to free up morespace for passengers, batteries, etc. In the case where the motor andthe motor controller are integrated, to achieve an efficient integrationof the drive assembly, it is necessary to consider an optimization ofconnection structures and related layout between the motor and the motorcontroller, cooling of the motor and the motor controller, optimallayout of related electrical connection structures, and an easiness ofassembly of related components.

SUMMARY Technical Objectives

A first objective of the present disclosure is to provide a driveassembly, which is provided with annularly arranged power transistorsand is capable of realizing integrated liquid cooling.

A second objective of the present disclosure is to provide a vehicleprovided with the above drive assembly.

A third objective of the present disclosure is to provide a driveassembly provided with a highly integrated controller at a rear end inan axial direction of the drive assembly.

A fourth objective of the present disclosure is to provide a vehicleprovided with the above drive assembly.

A fifth objective of the present disclosure is to provide a laminatedbusbar assembly featuring high assembly efficiency and a compactstructure.

A sixth objective of the present disclosure is to provide a motorcontroller provided with the above laminated busbar assembly.

A seventh objective of the present disclosure is to provide a driveassembly provided with the above motor controller.

An eighth objective of the present disclosure is to provide a vehicleprovided with the above drive assembly.

A ninth objective of the present disclosure is to provide a motorcontroller provided with a laminated busbar assembly laminated stablywith capacitors.

A tenth objective of the present disclosure is to provide a driveassembly provided with the above motor controller.

An eleventh objective of the present disclosure is to provide a vehicleprovided with the above drive assembly.

A twelfth objective of the present disclosure is to provide athree-phase terminal block, which optimizes a wiring layout bycircumferentially distributed terminals.

A thirteenth objective of the present disclosure is to provide a driveassembly provided with the above three-phase terminal block.

A fourteenth objective of the present disclosure is to provide a vehicleprovided with the above drive assembly.

A fifteenth objective of the present disclosure is to provide a holdingmember featuring an integral annular arrangement and easy assembly.

A sixteenth objective of the present disclosure is to provide a driveassembly provided with the above holding member.

A seventeenth objective of the present disclosure is to provide avehicle provided with the above drive assembly.

An eighteenth objective of the present disclosure is to provide a motorcontroller with an annular circuit layout.

A nineteenth objective of the present disclosure is to provide a driveassembly provided with the above motor controller.

A twentieth objective of the present disclosure is to provide a vehicleprovided with the above drive assembly.

A twenty-first objective of the present disclosure is to provide a driveassembly where a portion thereof passes through a circumferential wallthereof in a radial direction thereof to reduce a vertical dimension.

A twenty-second objective of the present disclosure is to provide avehicle provided with the above drive assembly.

A twenty-third objective of the present disclosure is to provide a driveassembly provided with a motor mounting chamber with an end sealed bypotting.

A twenty-fourth objective of the present disclosure is to provide avehicle provided with the above drive assembly.

A twenty-fifth objective of the present disclosure is to provide a driveassembly which is provided with an intermediate partition wall that iscapable of realizing liquid cooling.

A twenty-sixth objective of the present disclosure is to provide avehicle provided with the above drive assembly.

A twenty-seventh objective of the present disclosure is to provide adrive assembly provided with a resolver with a compact layout.

A twenty-eighth objective of the present disclosure is to provide avehicle provided with the above drive assembly.

Technical Solutions

In order to achieve the first objective of the present disclosure, thepresent disclosure provides a drive assembly provided with annularlyarranged power transistors. The drive assembly includes a housing, amotor controller, a rotor, and a stator, wherein the housing iscylindrical, and is provided therein with a chamber along an axialdirection of the housing; an inner wall of the housing is provided witha partition wall along a radial direction of the housing, the partitionwall divides the chamber into a motor mounting chamber and a controllermounting chamber; the rotor is provided in the motor mounting chamber;the stator is provided in the motor mounting chamber, and is locatedoutside the rotor; the motor controller is provided in the controllermounting chamber; an outer wall of the housing is provided with a liquidcooling channel which includes a motor cooling groove and a controllercooling groove that communicate with each other; the motor coolinggroove is located on an outer wall of the motor mounting chamber, andthe controller cooling groove is located on an outer wall of thecontroller mounting chamber; the motor controller includes a circuitboard assembly and multiple power transistors; the multiple powertransistors are provided at an outer circumference of the circuit boardassembly, and are electrically connected with the circuit boardassembly; and packages of the multiple power transistors are connectedwith an inner wall of the controller mounting chamber.

Further, the multiple power transistors may be evenly distributed alonga circumferential direction of the controller mounting chamber.

Further, the inner wall of the controller mounting chamber may beprovided with multiple heat-conducting surfaces which may be connectedalong a circumferential direction of the inner wall of the controllermounting chamber in sequence and may be respectively connected with thepackages of the power transistors.

Further, a collision avoidance groove may be provided between every twoadjacent heat-conducting surfaces.

Further, a heat-conducting sheet may be located between a package of thepower transistor and a heat-conducting surface.

Further, the housing may be provided with a power transistor mountinggroove at an inner side of the inner wall of the controller mountingchamber; the power transistor mounting groove may be annular; and themultiple power transistors may be located in the power transistormounting groove.

Further, the drive assembly further may include a holding member whichmay be located in the power transistor mounting groove and abuts betweena wall of the power transistor mounting groove and the powertransistors.

Further, the drive assembly further may include a positioning frame; thepositioning frame may include an annular base plate and multiplespacers; the multiple spacers may be provided on the annular base plate,and extend along an axial direction of the positioning frame; themultiple spacers may be distributed along a circumferential direction ofthe annular base plate; the positioning frame may be located in thepower transistor mounting groove; and every one spacer may be locatedbetween two adjacent power transistors.

Further, the spacer may be provided with a T-shaped radial section.

In order to achieve the second objective of the present disclosure, thepresent disclosure provides a vehicle provided with the above driveassembly.

In order to achieve the third objective of the present disclosure, thepresent disclosure provides a drive assembly provided with a motorcontroller at a rear end in an axial direction of the drive assembly.The drive assembly includes a housing, a motor controller, a bearing, arotor, and a stator, wherein the housing is cylindrical, and is providedtherein with a chamber along the axial direction; an inner wall of thehousing is provided with a partition wall along a radial direction ofthe housing, the partition wall divides the chamber into a motormounting chamber and a controller mounting chamber; the bearing isprovided on the partition wall; the rotor is provided in the motormounting chamber, and is connected with the bearing; the stator isprovided in the motor mounting chamber, and is located outside therotor; the motor controller is provided in the controller mountingchamber; the drive assembly further includes three single-phaseterminals, which pass through the partition wall and are connectedbetween the motor controller and the stator; and projection planes ofthe three single-phase terminals perpendicular to the axial directionare located between a projection plane of the bearing perpendicular tothe axial direction and a projection plane of the stator perpendicularto the axial direction.

Further, the partition wall may be provided with a mounting hole and amounting ring wall extending toward the motor mounting chamber at anouter circumference of the mounting hole; the bearing may be providedinside the mounting ring wall; and the three single-phase terminals maybe located at an outer circumference of the mounting ring wall.

Further, the three single-phase terminals may be located at an outercircumferential wall of the mounting ring wall; and the outercircumferential wall of the mounting ring wall may be provided with afirst collision avoidance groove at each of the three single-phaseterminals.

Further, the partition wall may be provided with three run-throughconnecting holes and three run-through fixing holes; the threeconnecting holes and the three fixing holes may be distributedalternately and evenly at intervals along an outer circumference of thebearing; and one single-phase terminal may pass through one connectinghole.

Further, a first end wall of the partition wall facing the motormounting chamber may be provided with second collision avoidancegrooves, which extends from the respective connecting holes to thestator.

Further, the drive assembly further may include a chamber cover, whichcovers the mounting hole.

Further, a second end wall of the partition wall facing the controllermounting chamber may be provided with fixing holes, and the chambercover may be located at the second end wall side, and may be connectedwith the fixing holes.

Further, the drive assembly may include a three-phase terminal block;the three-phase terminal block may include a terminal block body andthree single-phase terminals; the terminal block body may becylindrical; the three single-phase terminals may be each arranged alongan axial direction of the terminal block body, and may be arranged at anouter circumference of the terminal block body; the single-phaseterminals each may be provided with a first terminal portion and asecond terminal portion, which may be respectively located on two endsof the terminal block body along an axial direction thereof; and thefirst terminal portions may be connected with the stator, and the secondterminal portions may be connected with the motor controller.

Further, an outer wall of the housing may be provided with a liquidcooling channel; the liquid cooling channel may include a motor coolinggroove and a controller cooling groove that may communicate with eachother; the motor cooling groove may be located on an outer wall of themotor mounting chamber, and the controller cooling groove may be locatedon an outer wall of the controller mounting chamber; the motorcontroller may include a circuit board assembly and multiple powertransistors; the multiple power transistors may be provided at an outercircumference of the circuit board assembly, and may be electricallyconnected with the circuit board assembly; and packages of the multiplepower transistors may be connected with an inner wall of the controllermounting chamber.

In order to achieve the fourth objective of the present disclosure, thepresent disclosure provides a vehicle provided with the above driveassembly.

In order to achieve the fifth objective of the present disclosure, thepresent disclosure provides a laminated busbar assembly. The laminatedbusbar assembly includes a main circuit board, a positive electrodeconnection plate, a negative electrode connection plate, and athree-phase connection plate assembly, wherein the main circuit board,the positive electrode connection plate, and the negative electrodeconnection plate each are circular; an outer edge of the positiveelectrode connection plate is circumferentially provided with multiplepositive electrode pins, and an outer edge of the negative electrodeconnection plate is circumferentially provided with multiple negativeelectrode pins; the three-phase connection plate assembly includes threesingle-phase connection plates, which are fan-shaped or arcuate; anouter edge of each single-phase connection plate is provided withmultiple single-phase pins in a circumferential direction of eachsingle-phase connection plate; the main circuit board, the three-phaseconnection plate assembly, the negative electrode connection plate, andthe positive electrode connection plate are laminated along an axialdirection of the positive electrode connection plate; the threesingle-phase connection plates are coplanar; and the multiple positiveelectrode pins, the multiple negative electrode pins, and the multiplesingle-phase pins pass through the main circuit board and areelectrically connected with the main circuit board.

Further, the multiple positive electrode pins, the multiple negativeelectrode pins, and the multiple single-phase pins may be arranged alonga same circumferential direction.

Further, the outer edge of the negative electrode connection plate maybe provided with first pin collision avoidance grooves, and the outeredge of each single-phase connection plate may be provided with secondpin collision avoidance grooves; and the positive electrode pins maypass through the first pin collision avoidance grooves and the secondpin collision avoidance grooves, and the negative electrode pins maypass through the second pin collision avoidance grooves.

Further, two adjacent single-phase pins may form a single-phase bridgearm pin group; and one single-phase bridge arm pin group, one positiveelectrode pin, and one negative electrode pin may be cyclically arrangedin a circumferential direction of the laminated busbar assembly insequence.

Further, a center of the positive electrode connection plate may beprovided with a first collision avoidance hole and an inner edge of thepositive electrode connection plate may be provided with positiveelectrode connection terminals; a center of the negative electrodeconnection plate may be provided with a second collision avoidance holeand an inner edge of the negative electrode connection plate may beprovided with negative electrode connection terminals; the threesingle-phase connection plates may be each arcuate, and an inner edge ofeach of the three single-phase connection plates is provided with asingle-phase connection terminal; the first collision avoidance hole maycommunicate with the second collision avoidance hole; projection planesof the positive electrode connection terminals, the negative electrodeconnection terminals, and the three single-phase connection terminals,which are perpendicular to an axial direction of the laminated busbarassembly, may be located inside a projection plane of the secondcollision avoidance hole which is perpendicular to the axial direction.

In order to achieve the sixth objective of the present disclosure, thepresent disclosure provides a motor controller provided with the abovelaminated busbar assembly.

Further, the motor controller may include multiple power transistorssoldered at an outer circumference of the main circuit board; and themultiple power transistors may be distributed along a circumferentialdirection and may be located outside the three-phase connection plateassembly, the negative electrode connection plate, and the positiveelectrode connection plate along a radial direction thereof.

In order to achieve the seventh objective of the present disclosure, thepresent disclosure provides a motor controller provided with the abovedrive assembly.

Further, the drive assembly may include a housing, a bearing, a rotor,and a stator, wherein the housing may be cylindrical, and may beprovided therein with a chamber along an axial direction of the housing;an inner wall of the housing may be provided with a partition wall alonga radial direction of the housing, the partition wall divides thechamber into a motor mounting chamber and a controller mounting chamber;the bearing may be provided on the partition wall; the rotor may beprovided in the motor mounting chamber, and may be connected with thebearing; the stator may be provided in the motor mounting chamber, andmay be located outside the rotor; the motor controller may be providedin the controller mounting chamber; and the drive assembly further mayinclude three single-phase terminals, which may pass through thepartition wall and may be connected between the motor controller and thestator.

In order to achieve the eighth objective of the present disclosure, thepresent disclosure provides a vehicle provided with the above driveassembly.

In order to achieve the ninth objective of the present disclosure, thepresent disclosure provides a motor controller. The motor controllerincludes a laminated busbar assembly and multiple capacitors, whereinthe laminated busbar assembly includes a main circuit board, a positiveelectrode connection plate, and a negative electrode connection plate;the positive electrode connection plate is a bottomed cylinder, whichencloses a device accommodating space; an outer edge of the positiveelectrode connection plate is provided with multiple positive electrodepins in a circumferential direction of the positive electrode connectionplate; the negative electrode connection plate is circular, and an outeredge thereof is provided with multiple negative electrode pins in acircumferential direction of the negative electrode connection plate;the negative electrode connection plate covers the device accommodatingspace; the main circuit board, the negative electrode connection plate,and the positive electrode connection plate are laminated in sequencealong an axial direction of the motor controller; the multiple positiveelectrode pins and the multiple negative electrode pins pass through themain circuit board and are electrically connected with the main circuitboard; and the multiple capacitors are provided in the deviceaccommodating space, and are connected between the positive electrodeconnection plate and the negative electrode connection plate.

Further, the positive electrode connection plate may be provided with afirst collision avoidance hole at a center thereof, an inner ring wallat an outer circumference of the first collision avoidance hole, anouter ring wall surrounding an outer circumference of the inner ringwall, and a bottom ring wall located and connected between the innerring wall and the outer ring wall of the positive electrode connectionplate; and the inner ring wall, the outer ring wall, and the bottom ringwall may enclose an annular device accommodating space, in which themultiple capacitors may be distributed circumferentially.

Further, the bottom ring wall may be provided with multiple firstelectrical contacts, which may be circumferentially distributed, and maybe connected with positive electrodes of the capacitors, respectively;the negative electrode connection plate may be provided with multiplesecond electrical contacts, which may be circumferentially distributedand may be connected with negative electrodes of the capacitors,respectively.

Further, a center of the negative electrode connection plate may beprovided with a second collision avoidance hole and an inner edge of thenegative electrode connection plate may be provided with negativeelectrode connection terminals; the second collision avoidance hole maycommunicate with the first collision avoidance hole; an end portion ofthe inner ring wall closer to the negative electrode connection platemay be provided with supporting platforms; an inner edge of the positiveelectrode connection plate may be provided with positive electrodeconnection terminals; the negative electrode connection plate may beadjacent to the supporting platforms; and projection planes of thepositive electrode connection terminals and the negative electrodeconnection terminals, which are perpendicular to an axial direction ofthe motor controller, may be located inside a projection plane of thesecond collision avoidance hole perpendicular to the axial direction.

Further, the motor controller further may include a mounting shell; themounting shell may be a bottomed cylinder, a bottom of which may beprovided with a positioning post assembly extending along the axialdirection; the mounting shell may enclose a mounting and accommodatingspace in which the positive electrode connection plate, the negativeelectrode connection plate, and the multiple capacitors are provided;the main circuit board covers the mounting and accommodating space; andthe positioning post assembly may pass through the positive electrodeconnection plate and the negative electrode connection plate, and mayfit with the main circuit board for position limiting.

Further, the mounting shell may be provided with a third collisionavoidance hole at a center thereof, and connection and fixing platformsare provided in the third collision avoidance hole; and the connectionand fixing platforms each may be provided with a positive electrodeconnection position and a negative electrode connection position.

Further, the positioning post assembly may include multiple firstpositioning posts and multiple second positioning posts; the multiplefirst positioning posts may be distributed in a circumferentialdirection; the multiple second positioning posts may be distributed in acircumferential direction, and may be located outside the multiple firstpositioning posts; and the multiple first positioning posts and themultiple second positioning posts may pass through the positiveelectrode connection plate and the negative electrode connection platerespectively; and two adjacent first positioning posts and two adjacentsecond positioning posts which are respectively adjacent to the twoadjacent first positioning posts may enclose a capacitor positioningspace in which one capacitor is located.

Further, a connecting line of one first positioning post and one secondpositioning post adjacent thereto may pass through an axis of themounting shell.

In order to achieve the tenth objective of the present disclosure, thepresent disclosure provides a drive assembly provided with the abovemotor controller.

In order to achieve the eleventh objective of the present disclosure,the present disclosure provides a vehicle provided with the above driveassembly.

In order to achieve the twelfth objective of the present disclosure, thepresent disclosure provides a three-phase terminal block. Thethree-phase terminal block includes a terminal block body and threesingle-phase terminals; the terminal block body is cylindrical; thethree single-phase terminals each are arranged along an axial directionof the terminal block body, and are arranged at an outer circumferenceof the terminal block body; and the single-phase terminals each areprovided with a first terminal portion and a second terminal portion,which are respectively located on two ends along an axial direction ofthe terminal block body.

Further, the terminal block body may be provided therein with a wiringgroove; and on a projection plane of the terminal block bodyperpendicular to the axial direction, projection planes of the firstterminal portions perpendicular to the axial direction may be located atan outer circumference of a projection plane of the wiring grooveperpendicular to the axial direction, and projection planes of thesecond terminal portions perpendicular to the axial direction may belocated inside the projection plane of the wiring groove perpendicularto the axial direction.

Further, the terminal block body may include a central ring portion,outer connecting portions, and inner connecting portions; the centralring portion is annular and encircles the wiring groove; the innerconnecting portions each extend in the wiring groove from the centralring portion; the outer connecting portions each extend away from thewiring groove from the central ring portion; and the single-phaseterminals may pass through the central ring portion, the first terminalportions may be located at the outer connecting portions, and the secondterminal portions may be located at the inner connecting portions.

Further, the outer connecting portions and the first terminal portionsmay be located outside the central ring portion in the axial direction.

Further, the three single-phase terminals may be connected with thecentral ring portion, the outer connecting portions, and the innerconnecting portions through a secondary injection molding process.

Further, each outer connecting portion may be provided with a shieldingwall at an outer circumference of each first terminal portion.

Further, the wiring groove may be further provided therein with mountingportions, which may be respectively located beside the second terminalportions.

Further, a magnetic ring may be further provided at the outercircumference of the terminal block body.

In order to achieve the thirteenth objective of the present disclosure,the present disclosure provides a drive assembly provided with the abovethree-phase terminal block.

In order to achieve the fourteenth objective of the present disclosure,the present disclosure provides a vehicle provided with the above driveassembly.

In order to achieve the fifteenth objective of the present disclosure,the present disclosure provides an annular holding member. The annularholding member includes an annular base portion and multiple holdingportions, wherein the multiple holding portions are distributed on theannular base portion in a circumferential direction thereof.

Further, the annular base portion may be sheet-like.

Further, the holding portions may be arc-shaped.

Further, the holding portions each may include a fixed portion and anabutting portion; the fixed portion may be connected with the annularbase portion; and the abutting portion protrudes from the fixed portiontoward an outer side of the annular base portion.

Further, the abutting portion may be arc-shaped, and protrudes towardthe outside of the annular base portion.

Further, each holding portion further may include a free portion; theabutting portion may be located between the fixed portion and the freeportion; and the fixed portion and the free portion may be located at aside of the abutting portion closer to an inner side thereof.

Further, a first slot extending along an axial direction of the holdingmember may be provided between two adjacent holding portions.

Further, two adjacent holding portions may form a device holding group;a second slot extending along the axial direction may be providedbetween every two adjacent device holding groups; and a length of thesecond slot along the axial direction may be greater than a length ofthe first slot along the axial direction.

In order to achieve the sixteenth objective of the present disclosure,the present disclosure provides a drive assembly provided with the aboveholding member.

In order to achieve the seventeenth objective of the present disclosure,the present disclosure provides a vehicle provided with the above driveassembly.

In order to achieve the eighteenth objective of the present disclosure,the present disclosure provides a motor controller. The motor controllerincludes a laminated busbar assembly and multiple power transistors,wherein the laminated busbar assembly includes a main circuit board, apositive electrode connection plate, a negative electrode connectionplate, and a three-phase connection plate assembly; the main circuitboard, the positive electrode connection plate, and the negativeelectrode connection plate are each circular; an outer edge of thepositive electrode connection plate is provided with multiple positiveelectrode pins in a circumferential direction of the positive electrodeconnection plate, and an outer edge of the negative electrode connectionplate is provided with multiple negative electrode pins in acircumferential direction of the negative electrode connection plate;the three-phase connection plate assembly includes three single-phaseconnection plates, which are each arcuate; an outer edge of each of thesingle-phase connection plates is provided with multiple single-phasepins in a circumferential direction of the each of the single-phaseconnection plates; a center of the positive electrode connection plateis provided with a first collision avoidance hole, and an inner edge ofthe positive electrode connection plate is provided with positiveelectrode connection terminals; a center of the negative electrodeconnection plate is provided with a second collision avoidance hole andan inner edge of the negative electrode connection plate is providedwith negative electrode connection terminals; an inner edge of each ofthe single-phase connection plates is provided with a single-phaseconnection terminal; the main circuit board, the three-phase connectionplate assembly, the negative electrode connection plate, and thepositive electrode connection plate are laminated in sequence along anaxial direction of the motor controller; the three single-phaseconnection plates are coplanar; the main circuit board is provided witha connection position, a control circuit position, a first solderingposition, and a second soldering position; the connection position islocated in a center of the main circuit board; the control circuitposition surrounds the connection position; the first soldering positionsurrounds the control circuit position; the second soldering positionsurrounds the first soldering position; projection planes of thepositive electrode connection terminals, the negative electrodeconnection terminals, and the single-phase connection terminals, whichare perpendicular to the axial direction of the motor controller, arelocated inside a projection plane of the connection positionperpendicular to the axial direction; the multiple positive electrodepins, the multiple negative electrode pins, and the multiplesingle-phase pins are electrically connected with the main circuit boardat the first soldering position; and the multiple power transistorssurround the main circuit board, and are electrically connected with themain circuit board at the second soldering position.

Further, the multiple power transistors may be evenly distributed alonga same circumferential direction of the main circuit board.

Further, the multiple positive electrode pins, the multiple negativeelectrode pins, and the multiple single-phase pins may be arranged alonga same circumferential direction of the main circuit board.

Further, the motor controller may include multiple capacitors, which maybe located and connected between the negative electrode connection plateand the positive electrode connection plate.

Further, projection planes of the capacitors perpendicular to the axialdirection may be located inside a projection plane of the controlcircuit position perpendicular to the axial direction.

Further, the three single-phase connection terminals may becircumferentially evenly distributed; and the motor controller furthermay include three Hall elements, which may be provided at the threesingle-phase connection terminals, respectively.

Further, one positive electrode connection terminal and one negativeelectrode connection terminal may be located between two adjacentsingle-phase connection terminals.

Further, the positive electrode connection plate may be provided withthree positive electrode connection terminals, and the negativeelectrode connection plate may be provided with three negative electrodeconnection terminals; and the positive electrode connection terminal andthe negative electrode connection terminal may be alternatedcircumferentially.

In order to achieve the nineteenth objective of the present disclosure,the present disclosure provides a drive assembly provided with the abovemotor controller.

In order to achieve the twentieth objective of the present disclosure,the present disclosure provides a vehicle provided with the above driveassembly.

In order to achieve the twenty-first objective of the presentdisclosure, the present disclosure provides a drive assembly. The driveassembly includes a housing, a motor controller, a rotor, and a stator,wherein the housing is cylindrical, and is provided therein with achamber along an axial direction of the housing; an inner wall of thehousing is provided with a partition wall along a radial direction ofthe housing, the partition wall divides the chamber into a motormounting chamber and a controller mounting chamber; the rotor isprovided in the motor mounting chamber; the stator is provided in themotor mounting chamber, and is located outside the rotor; the motorcontroller is provided in the controller mounting chamber, and isconnected with the stator; a circumferential wall of the housing,located at the controller mounting chamber, is provided with arun-through connecting hole along the radial direction; the driveassembly further includes a connecting assembly; the connecting assemblyincludes a positive electrode connecting plate and a negative electrodeconnecting plate; both an inner connecting terminal portion of thepositive electrode connecting plate and an inner connecting terminalportion of the negative electrode connecting plate are connected withthe motor controller; the positive electrode connecting plate and thenegative electrode connecting plate pass through the connecting hole;and the positive electrode connecting plate and the negative electrodeconnecting plate each are provided with an outer connecting terminalportion on an outer circumferential wall of the housing.

Further, the positive electrode connecting plate and/or the negativeelectrode connection plate may be sheet-like.

Further, the motor controller may be provided with three positiveelectrode connection terminals and three negative electrode connectionterminals, the positive electrode connection terminal and the negativeelectrode connection terminal may be alternated circumferentially; theinner connecting terminal portion of the positive electrode connectingplate may include three positive electrode connecting portions, whichmay be connected with the three positive electrode connection terminals,respectively; and the inner connecting terminal portion of the negativeelectrode connecting plate may include three negative electrodeconnecting portions, which may be connected with the three negativeelectrode connection terminals, respectively.

Further, the inner connecting terminal portion of the positive electrodeconnecting plate further may include a positive electrode connectingbase portion, and the three positive electrode connecting portions maybe connected with and circumferentially evenly distributed on an outeredge of the positive electrode connecting base portion; and the innerconnecting terminal portion of the negative electrode connecting platefurther may include a negative electrode connecting base portion, andthe three negative electrode connecting portions may be connected withand circumferentially evenly distributed on an outer edge of thenegative electrode connecting base portion.

Further, the positive electrode connecting base portion and the negativeelectrode connecting base portion may be laminated on the motorcontroller along an axial direction of the housing.

Further, the three positive electrode connection terminals and the threenegative electrode connection terminals may be located on a same radialplane; the negative electrode connecting base portion may be locatedbetween the positive electrode connecting base portion and the motorcontroller; the positive electrode connecting base portion and positiveelectrode connecting portions may form a first collision avoidancerecess in which the negative electrode connecting base portion may belocated; alternatively, the positive electrode connecting base portionmay be located between the negative electrode connecting base portionand the motor controller, and the negative electrode connecting baseportion and negative electrode connecting portions may form a secondcollision avoidance recess in which the positive electrode connectingbase portion may be located.

Further, the connecting assembly further may include a connectingsleeve, which may be located in the controller mounting chamber andcovers the positive electrode connecting plate and the negativeelectrode connecting plate.

Further, the connecting assembly further may include a connecting box,which may be connected with the outer circumferential wall of thehousing located at the controller mounting chamber; an interior of theconnecting box may communicate with the controller mounting chamberthrough the connecting hole; and both the outer connecting terminalportion of the positive electrode connection plate and the outerconnecting terminal portion of the negative electrode connection plateextend into the connecting box.

Further, the drive assembly may be provided with a mounting orientation;and in a vertical direction of the mounting orientation, the housing mayinclude a top portion and a bottom portion, and the connecting hole maybe located between the top portion and the bottom portion of thehousing.

In order to achieve the twenty-second objective of the presentdisclosure, the present disclosure provides a vehicle provided with theabove drive assembly.

In order to achieve the twenty-third objective of the presentdisclosure, the present disclosure provides a drive assembly. The driveassembly includes a housing, a motor controller, a bearing, a rotor, anda stator, wherein the housing is provided therein with a chamber alongan axial direction of the housing; an inner wall of the housing isprovided with a partition wall along a radial direction of the housing,the partition wall divides the chamber into a motor mounting chamber anda controller mounting chamber; the bearing is provided on the partitionwall; the rotor is provided in the motor mounting chamber, and isconnected with the bearing; the stator is provided in the motor mountingchamber, and is located outside the rotor; the motor controller isprovided in the controller mounting chamber; the drive assembly furtherincludes three single-phase terminals; the single-phase terminals eachare provided with a first terminal portion at one end in the motormounting chamber and a second terminal portion at one end in thecontroller mounting chamber; the first terminal portions are connectedwith the stator, and the second terminal portions are connected with themotor controller; and an end surface of the partition wall facing themotor mounting chamber is filled with potting glue, which covers thefirst terminal portions.

Further, projection planes of the three first terminal portionsperpendicular to an axial direction of the drive assembly may be locatedbetween a projection plane of the bearing perpendicular to the axialdirection and a projection plane of the stator perpendicular to theaxial direction.

Further, the partition wall may be provided with a mounting hole and amounting ring wall extending toward the motor mounting chamber at anouter circumference of the mounting hole; the bearing may be providedinside the mounting ring wall; the three single-phase terminals may belocated at an outer circumference of the mounting ring wall; and thepotting glue may be filled between the mounting ring wall, the partitionwall and the inner wall of the housing.

Further, the three single-phase terminals may be located at an outercircumferential wall of the mounting ring wall; and the outercircumferential wall of the mounting ring wall may be provided with afirst collision avoidance groove at each of the three single-phaseterminals.

Further, the partition wall may be provided with three run-throughconnecting holes and three run-through inserting holes; the threeconnecting holes and the three inserting holes may be distributedalternately and evenly at intervals along an outer circumference of thebearing; one single-phase terminal may pass through one connecting hole;and the potting glue covers the three connecting holes and the threeinserting holes.

Further, a first end wall of the partition wall facing the motormounting chamber may be provided with second collision avoidancegrooves; each of the second collision avoidance groove extends from therespective connecting holes to the stator; terminals of the stator maybe located in the second collision avoidance grooves, and may beconnected with the first terminal portions, such that the potting gluecovers the terminals of the stator.

Further, the stator may include a winding; and the potting glue coversan end portion of the winding closer to the partition wall.

Further, the drive assembly may include a three-phase terminal block;the three-phase terminal block may include a terminal block body andthree single-phase terminals; the terminal block body is cylindrical;the three single-phase terminals may be each arranged along an axialdirection of the terminal block body, and may be arranged at an outercircumference of the terminal block body; the single-phase terminalseach may be provided with a first terminal portion and a second terminalportion, which may be respectively located on two ends along an axialdirection of the terminal block body; and the first terminal portionsmay be connected with the stator, and the second terminal portions maybe connected with the motor controller.

Further, an outer wall of the housing may be provided with a liquidcooling channel; and the partition wall may be provided with partitioncooling grooves, each of which may communicate with the liquid coolingchannel.

In order to achieve the twenty-fourth objective of the presentdisclosure, the present disclosure provides a vehicle provided with theabove drive assembly.

In order to achieve the twenty-fifth objective of the presentdisclosure, the present disclosure provides a drive assembly. The driveassembly includes a housing, a motor controller, a bearing, a rotor, anda stator, wherein the housing is provided therein with a chamber alongan axial direction of the housing; an inner wall of the housing isprovided with a partition wall along a radial direction of the housing,the partition wall divides the chamber into a motor mounting chamber anda controller mounting chamber; the bearing is provided on the partitionwall; the rotor is provided in the motor mounting chamber, and isconnected with the bearing; the stator is provided in the motor mountingchamber, and is located outside the rotor; the motor controller isprovided in the controller mounting chamber; the drive assembly furtherincludes three single-phase terminals, which pass through the partitionwall and are connected between the motor controller and the stator; anouter wall of the housing is provided with a liquid cooling channel; andthe partition wall is provided with a partition cooling groove, whichcommunicates with the liquid cooling channel.

Further, the partition wall is provided with multiple partition coolinggrooves which may be distributed in a circumferential direction of thepartition wall.

Further, the partition cooling groove may be provided with a guidebaffle, which extends inwards.

Further, an outer end of the partition cooling groove may be providedwith mounting groove; and the guide baffle may be provided with lockingportions, which may be located in the mounting groove.

Further, the guide baffle may be provided with a guide groove close toan outer end of the partition cooling groove.

Further, the guide baffle may be provided with a through hole at acenter thereof.

Further, the outer end of the partition cooling groove may have acircumference greater than a circumference of an inner end of thepartition cooling groove.

Further, the outer end of the partition cooling groove and an outer endof the liquid cooling channel may be open; and the drive assemblyfurther may include a casing, which covers the outer wall of thehousing, and may be located outside the partition cooling groove and theliquid cooling channel.

Further, the liquid cooling channel may include a motor cooling grooveand a controller cooling groove; the motor cooling groove may be locatedon an outer wall of the motor mounting chamber, and the controllercooling groove may be located on an outer wall of the controllermounting chamber; and the partition cooling groove may communicate withthe motor cooling groove and the controller cooling groove, and may belocated therebetween.

In order to achieve the twenty-sixth objective of the presentdisclosure, the present disclosure provides a vehicle provided with theabove drive assembly.

In order to achieve the twenty-seventh objective of the presentdisclosure, the present disclosure provides a drive assembly. The driveassembly includes a housing, a motor controller, a cover, a bearing, arotor, and a stator, wherein the housing is provided therein with achamber along an axial direction of the housing; an inner wall of thehousing is provided with a partition wall along a radial direction ofthe housing, the partition wall divides the chamber into a motormounting chamber and a controller mounting chamber; the partition wallis provided with a mounting hole, in which the bearing is provided; therotor is provided in the motor mounting chamber, and is connected withthe bearing; the stator is provided in the motor mounting chamber, andis located outside the rotor; the motor controller is provided in thecontroller mounting chamber; the drive assembly further includes aresolver; the resolver is provided in the mounting hole, and is locatedat an end of the bearing closer to the controller mounting chamber; andthe resolver is connected with a rotating shaft of the rotor, and iselectrically connected with the motor controller.

Further, the drive assembly further may include a chamber cover, whichcovers the mounting hole and may be connected with the partition wall;and the chamber cover covers the resolver at the controller mountingchamber side.

Further, the chamber cover may be provided with a signal connectionterminal, which may be connected with the resolver.

Further, the motor controller may include a main circuit board; and themain circuit board may be provided with a signal connection socket,which may be connected with the signal connection terminal.

Further, the drive assembly further may include a three-phase terminalblock; the three-phase terminal block may be connected with thepartition wall, and may be located on one end of the mounting holecloser to the controller mounting chamber; the three-phase terminalblock may include a terminal block body and three single-phaseterminals; the terminal block body is cylindrical; the threesingle-phase terminals each may be arranged along an axial direction ofthe terminal block body, and may be arranged at an outer circumferenceof the terminal block body; the three-phase terminal block may beprovided on one end of the mounting hole in the motor mounting chamber;and the three single-phase terminals may pass through the partition walland may be connected between the motor controller and the stator.

Further, the partition wall may be provided with a mounting ring wallextending toward the motor mounting chamber at an outer circumference ofthe mounting hole; the bearing may be provided inside the mounting ringwall; the single-phase terminals each may be provided with a firstterminal portion and a second terminal portion, which may berespectively located on two ends along an axial direction of theterminal block body; and the first terminal portions of the threesingle-phase terminals may be located at an outer circumference of themounting ring wall.

Further, the terminal block body may be provided therein with a wiringgroove; on a projection plane of the terminal block body perpendicularto the axial direction, projection planes of the first terminal portionsperpendicular to the axial direction may be located at an outercircumference of a projection plane of the wiring groove perpendicularto the axial direction, and projection planes of the second terminalportions perpendicular to the axial direction may be located inside theprojection plane of the wiring groove perpendicular to the axialdirection; and the resolver is located in the wiring groove.

Further, a magnetic ring may be further provided at the outercircumference of the terminal block body, and may be located outside ofthe resolver.

Further, an outer wall of the housing may be provided with a liquidcooling channel; and the partition wall may be provided with partitioncooling grooves, each of which may communicate with the liquid coolingchannel.

Further, an end surface of the partition wall facing the motor mountingchamber may be filled with potting glue.

In order to achieve the twenty-eighth objective of the presentdisclosure, the present disclosure provides a vehicle provided with theabove drive assembly.

Solutions to the Problem Beneficial Effects of the Present DisclosureBeneficial Effects

The cylindrical housing enables full use of the space at the rear end inan axial direction of the motor, such that the rotor is rotatablyprovided in the motor mounting chamber, and the motor controller isprovided in the controller mounting chamber. This design effectivelyreduces the occupied space, improves the space utilization, and realizesthe high integration of the drive assembly. The multiple powertransistors are circumferentially arranged and connected with the innerwall of the controller mounting chamber. The waste heat of the powertransistors can be efficiently conducted to the interconnectedcontroller cooling groove and motor cooling groove, realizing integratedliquid cooling and improving heat dissipation efficiency. Besides, usingthe inner circumferential wall as a heat conductor can effectivelyoptimize the device layout of the motor controller, avoid the need foran additional heat conduction structure, and facilitate the highlyintegrated design of the device.

The even distribution facilitates space utilization. The powertransistors are turned on by time sharing in actual operation.Therefore, the distributed arrangement realizes time-sharing heatconduction at different positions, thereby further improving the heatconduction efficiency.

The heat-conducting surfaces are closely adjacent to the packages of thepower transistors, which increases the heat conduction area and improvesthe heat conduction efficiency. The collision avoidance grooves areconvenient for the processing of the heat-conducting surfaces, and acertain collision avoidance space is formed between two powertransistors.

The heat-conducting sheets may be made of thermally conductive siliconeor a thermally conductive ceramic plate, which improves the heatconduction efficiency between the packages of the power transistors andthe heat-conducting surfaces.

The power transistor mounting groove positions and limits the powertransistors.

The holding member is provided in the power transistor mounting groove,and exerts an elastic force on the power transistors toward the innerwall of the controller mounting chamber, so that the power transistorsare closely attached to the inner wall of the controller mountingchamber, thereby ensuring stable heat conduction.

The positioning frame is provided in the power transistor mountinggroove, which limits the power transistors, so as to effectively improvethe mounting stability of the power transistors. This design improvesthe performance stability of the drive assembly that is used in a severevibration environment.

It can be seen from the above that, by utilizing the space at the rearend in the axial direction of the motor, through the arrangement of thepartition wall and the bearing, the rotor is rotatably provided in themotor mounting chamber, and the motor controller is provided in thecontroller mounting chamber. Three single-phase terminals pass throughthe partition wall and are connected between the motor controller andthe stator. The projection planes of the three single-phase terminalsperpendicular to the axial direction are located between the projectionplane of the bearing perpendicular to the axial direction and theprojection plane of the stator perpendicular to the axial direction.When the terminals of the stator and the single-phase terminals areconnected, that is, when the rotor is not mounted, an operating space isreserved between the bearing and the stator. This facilitates theconnection of the terminals of the stator and the single-phaseterminals. The motor controller is provided at the rear end in an axialdirection of the motor, which effectively reduces the occupied space,improves the space utilization, and realizes the high integration of thedrive assembly.

The bearing is stably provided in the mounting ring wall, which improvesthe operational stability of the motor, and the three single-phaseterminals are located on the outer circumferential wall of the mountingring wall, which makes it convenient for the mounting and positioning ofthe terminals of the stator.

The first collision avoidance grooves can position the terminals of thestator, and optimize the layout space, thereby improving the connectingeasiness and reliability.

The fixing holes are configured to attach and fix the motor controller.The connecting holes and the fixing holes are located between thebearing and the stator, so that it is easy to disassemble and assemble.

The second collision avoidance grooves can accommodate the wires andterminals of the stator, thereby optimizing the layout space.

The chamber cover isolates the two chambers, thereby improving theoperational stability.

The fixing holes located on the second end wall of the partition wallcan be used to mount and position the terminal block, such thatdifferent devices can be disassembled and assembled from both sides ofthe partition wall.

In addition, considering that the stator has a three-phase winding, thethree single-phase terminals are arranged at the outer circumference ofthe terminal block body to connect the terminals of the statorcorrespondingly, thereby optimizing the wiring layout. In addition, thespace formed by the three single-phase terminals can accommodatecomponents such as the bearing, thereby improving the compactness of thestructure layout.

The multiple power transistors are circumferentially arranged andconnected with the inner wall of the controller mounting chamber. Thewaste heat of the power transistors can be efficiently conducted to theinterconnected controller cooling groove and motor cooling groove,realizing integrated liquid cooling and improving heat dissipationefficiency. Besides, using the inner circumferential wall as a heatconductor can effectively optimize the device layout of the motorcontroller, avoid the need for a heat conduction structure, andfacilitate the highly integrated design of the device.

The main circuit board, the positive electrode connection plate, and thenegative electrode connection plate are each configured in a circle, andthe three single-phase connection plates are each configured in a fan orarcuate shape. The three single-phase connection plates are coplanar andform a circle-like outline. The positive electrode connection plate, thenegative electrode connection plate and the three single-phaseconnection plates are laminated, and are electrically connected with themain circuit board through pins at their respective outer edges, so asto realize the corresponding circuit connection. The laminated structurereduces the axial dimension and achieves a compact purpose, and thelaminated structure is simple and is easy for assembly, improvingassembly efficiency.

The arrangement of the pins in the same circumferential directionoptimizes the wiring layout and a circuit layout of the main circuitboard.

The collision avoidance grooves make it easy for the pins to be arrangedin the same circumferential direction, and can achieve the correspondinglimiting purpose.

One single-phase bridge arm pin group, one positive electrode pin, andone negative electrode pin constitute one single-phase bridge arm. Themultiple bridge arms are arranged in an orderly manner in thecircumferential direction of the main circuit board, and the powertransistors operate in a time-sharing manner during inverter driving, sothe power transistors can also be distributed at intervals by using UVWin the circumferential direction. Therefore, the distributed arrangementrealizes time-sharing heat conduction at different positions, therebyfurther improving the heat conduction efficiency.

The collision avoidance holes are centrally provided, and the arcuatesingle-phase connection plates in a circle form a connecting space at acenter. Thus, the projection planes of the positive electrode connectionterminals, the negative electrode connection terminals, and the threesingle-phase connection terminals, which are perpendicular to the axialdirection, are located inside the projection plane of the secondcollision avoidance hole perpendicular to the axial direction. Thepositive electrode connection terminals, negative electrode connectionterminals and single-phase connection terminals are centrally arranged,which is convenient for connection, and the pins are arrangedcircumferentially, which effectively optimizes the circuit wiringlayout.

The connection terminals are arranged centrally, the pins are arrangedcircumferentially, and the power transistors are located at the outercircumference of the main circuit board. Thus, the pins of the powertransistors are located at the circumference of the positive electrodeand negative electrode pins and the single-phase pins, such that themain circuit board has more central space for the driving circuitlayout, thereby effectively optimizing the circuit wiring layout.

The positive electrode connection plate is a bottomed cylinder, whichaccommodates the multiple capacitors and realizes effective positioningof the capacitors. In addition, the negative electrode connection plateplays the role of covering and positioning, which provides desiredsupport for the stable connection of the capacitors. The main circuitboard, the negative electrode connection plate, the multiple capacitorsand the positive electrode connection plate are laminated in sequence.The laminated structure reduces the axial dimension and achieves thecompact purpose, and the laminated structure is simple and is easy forassembly, improving assembly efficiency.

The first collision avoidance hole is used for mounting, positioning andplacement of terminals. The annular device accommodating space is usedto hold the multiple capacitors, such that the multiple capacitors aredistributed circumferentially and well supported and positioned. Theaxially arranged electrical contacts are respectively electricallyconnected with the two ends of the capacitor to ensure the electricalconnection stability.

The negative electrode connection plate is stably provided on thesupporting platform, and the positive electrode connection terminals andthe negative electrode connection terminals are located in the secondcollision avoidance hole. This design realizes the centralizedarrangement of terminals, optimizes the layout, and improves theconnection efficiency. The mounting shell and the positioning postassembly provide stable support and fixation for the main circuit board,the positive electrode connection plate, the negative electrodeconnection plate, and even the motor controller.

The third collision avoidance hole of the mounting shell is used forassembly and positioning of other equipment. The connection and fixingplatforms provide stable support for the connection of the positiveelectrode and negative electrode. The positioning posts provide supportand positioning for the main circuit board, the positive electrodeconnection plate and the negative electrode connection plate. Acapacitor positioning space is formed by the four positioning posts,which provides stable support for the connection of the capacitors andensures the stability of the motor controller.

The radial arrangement of the first positioning posts and the secondpositioning posts is adapted to the arrangement direction of thecapacitors which are arranged circumferentially, thereby furtherpositioning the capacitors and improving the stability of thecapacitors.

In addition, considering that the stator has a three-phase winding, thethree single-phase terminals are arranged at the outer circumference ofthe terminal block body to connect the terminals of the statorcorrespondingly, thereby optimizing the wiring layout. In addition, thespace formed by the three single-phase terminals can accommodatecomponents such as the bearing, thereby improving the compactness of thestructure layout.

The first terminal portions and the second terminal portions arerespectively located outside or inside the wiring groove. The firstterminal portions are circumferentially scattered to avoid the bearing,and the second terminal portions are circumferentially concentrated toachieve centralized connection of the motor controller and improve thecircuit layout utilization of the motor controller.

Through secondary injection molding, the central ring portion, the outerconnecting portions and the inner connecting portions are wrapped aroundthe single-phase terminals, thereby improving the protection between thetwo terminal portions. The central ring portion can also be used for themounting and positioning of other devices. The outer connecting portionsand the first terminal portions are located outside the central ringportion in an axial direction and protrude outwards in a radialdirection to avoid the bearing or the resolver and improve the spaceutilization.

The shielding wall can play a role of positioning and limiting forwiring to improve the connection stability, and also play a role ofinsulating the terminals of the stator. The three-phase terminal blockis fixedly mounted in the drive assembly through the mounting portions,and one mounting portion is located beside one second terminal portions,which is easy for assembly and disassembly. Since the terminal blockbody can be provided with devices such as the resolver, the magneticring is provided around the terminal block body to reduceelectromagnetic interference.

To hold the annularly arranged multiple power transistors at the sametime through the annular base portion and the circumferentiallydistributed holding portions, the holding member is placed in a presetposition, which realizes simple assembly and quick positioning.

The manufacturing, forming, assembling and positioning of the sheet-likeholding member are relatively simple.

The abutting portions protrude outwards and are configured in an arcshape to provide a stable force for holding the power transistors.

Two adjacent holding portions form a device holding group for holdingone power transistor. One first slot maintains the same holding force oftwo holding portions, and one second slot separates two adjacent deviceholding groups. This design enables the device holding groups to have alarge offset space, and with the help of the annular base portion, thedevice holding groups can well hold the power transistors.

The laminated structure of the circuit boards reduces the axialdimension and achieves the compact purpose, and the laminated structureis simple and is easy for assembly, improving assembly efficiency. Theconnection position, the control circuit position, the first solderingposition, and the second soldering position are sequentially arrangedfrom a center to an outer side of the main circuit board along a radialdirection of the main circuit board. The control circuit position, thefirst soldering position and the second soldering position arerespectively configured in a ring shape. The pins of the positiveelectrode connection plate, the negative electrode connection plate andthe three single-phase connection plates on their respective outer edgesare electrically connected with the main circuit board, so as to realizethe corresponding circuit connection. The connection terminals arecentrally arranged, and the central control circuit has a relativelylarge space. The annular circuit layout improves the structuralcoordination with the drive assembly.

The arrangement in inner and outer circumferential directions optimizesthe wiring layout and the circuit layout of the main circuit board.

The capacitors are axially connected between the negative electrodeconnection plate and the positive electrode connection plate. Since thecontrol circuit position does not need to be wired, the projection planeof the capacitors perpendicular to the axial direction is located insidethe projection plane of the control circuit position perpendicular tothe axial direction. The design avoids the pins and terminal portions onboth sides in the radial direction, and effectively improves therationality of the space layout.

The positive electrode connection terminals, the negative electrodeconnection terminals and the single-phase connection terminals arecircumferentially arranged in sequence, and the Hall elements areprovided at the single-phase connection terminals, which realizes theefficient space utilization of the collision avoidance holes andimproves the connection easiness.

By utilizing the space at the rear end in the axial direction of themotor, through the arrangement of the partition wall and the bearing,the rotor is rotatably provided in the motor mounting chamber, and themotor controller is provided in the controller mounting chamber. Thisdesign effectively reduces the occupied space, improves the spaceutilization, and realizes the high integration of the drive assembly.The positive electrode connecting plate and the negative electrodeconnecting plate radially pass through the circumferential wall, makingfull use of the space in the horizontal direction and reducing the spaceoccupied in the vertical direction or the axial direction.

The sheet-like connecting plates are easy for positioning and mounting,and further facilitate the layout of the axial space.

The arrangement of the three positive electrode connection terminals andthe three negative electrode connection terminals facilitates theannular circuit layout of the motor controller. Correspondingly, theconnecting plates are each provided with three connecting portions in acircumferential direction. The connecting base portions are used forbearing and connection, and provide stable support and fixation for theconnecting plate through triangular positioning.

The laminated arrangement improves the compactness of the structuralarrangement. In order to solve the interference problem caused by thelaminated arrangement, collision avoidance recesses are provided.Through the reasonable structural arrangement, the positive electrodeconnecting plate and the negative electrode connecting plate arelaminated without interfering with each other.

The insulation design of the connecting sleeve improves the protectionand safety of the connecting plates. The connecting box provided on theradial outer circumferential wall facilitates the connection of thepositive electrode and negative electrode of the battery without openingthe motor mounting chamber.

The outlet direction of the positive electrode connecting plate and thenegative electrode connecting plate is designed based on the mountingorientation of the drive assembly. In order to shorten the verticaldimension such that the vehicle has more vertical space at the driveassembly, the connecting holes are located between the top portion andthe bottom portion of the housing, and the positive electrode connectingplate and the negative electrode connecting plate are inclined to thevertical direction.

The present disclosure utilizes the space at the rear end in the axialdirection of the motor. Through the arrangement of the partition walland the bearing, the rotor is rotatably provided in the motor mountingchamber and the motor controller is provided in the controller mountingchamber. The three single-phase terminals pass through the partitionwall and are connected between the motor controller and the stator. Thepotting glue is filled on the end surface of the partition wall facingthe motor mounting chamber, such that the potting glue covers the firstterminal portions that are connected with the terminals of the stator.This realizes potting and sealing of the first terminal portions and theterminals of the stator, thereby effectively improving the protectionand efficiently conducting the waste heat to the partition wall.

The projection planes of the three single-phase terminals perpendicularto the axial direction are located between the projection plane of thebearing perpendicular to the axial direction and the projection plane ofthe stator perpendicular to the axial direction. The operating spacereserved between the bearing and the stator facilitates the connectionof the terminals of the stator and the single-phase terminals. Thebearing is stably provided in the mounting ring wall, which improves theoperational stability of the motor, and the three single-phase terminalsare located on the outer circumferential wall of the mounting ring wall,which makes it convenient for the mounting and positioning of theterminals of the stator. In addition, the potting glue is accuratelyfilled between the mounting ring wall, the partition wall and the innerwall of the housing, such that the waste heat generated by the bearingcan also be conducted through the potting glue.

The first collision avoidance groove can position the terminals of thestator, and optimize the layout space, thereby improving the connectingeasiness and reliability. The inserting holes are used for the wire ofsome sensors such as temperature sensors to pass through, and theconnecting holes are used for the single-phase terminals to passthrough, so as to improve the isolation between the motor mountingchamber and the controller mounting chamber and avoid mutualinterference.

The second collision avoidance grooves can accommodate the leads andterminals of the stator, thereby optimizing the layout space. Inaddition, the terminals and the leads of the stator, and an end of thewinding are positioned by the potting glue. The three single-phaseterminals are arranged at the outer circumference of the terminal blockbody to connect the terminals of the stator correspondingly, therebyoptimizing the wiring layout. In addition, the space formed by the threesingle-phase terminals can accommodate components such as the bearing,thereby improving the compactness of the structure layout.

The liquid cooling channel of the housing communicates with thepartition cooling grooves of the partition wall. Therefore, the wasteheat of the bearing and the resolver can be quickly transferred from thepartition wall to the housing, thereby improving the heat conductionefficiency and the operating performance of the drive assembly.

The present disclosure utilizes the space at the rear end in the axialdirection of the motor. Through the arrangement of the partition walland the bearing, the rotor is rotatably provided in the motor mountingchamber and the motor controller is provided in the controller mountingchamber. Three single-phase terminals pass through the partition walland are connected between the motor controller and the stator. Theliquid cooling channel of the housing communicates with the partitioncooling grooves of the partition wall. Therefore, the waste heat of thebearing and some other components can be quickly transferred from thepartition wall to the housing, thereby improving the heat conductionefficiency and the operating performance of the drive assembly.

Since the partition wall needs to support the bearing and other devices,the partition wall needs a certain structural space. Thus, the partitioncooling grooves are distributed circumferentially to improve the heatconduction efficiency of the partition wall without affecting thestrength.

The guide baffles are configured to guide the cooling liquid at theouter side from outer ends to inner ends of the partition coolinggrooves, and the mounting grooves make it easy for the mounting andpositioning of the guide baffles. The guide grooves at outer ends andthe through holes in centers are designed to adjust the flow directionof the cooling liquid, so as to realize sufficient heat exchange andimprove the thermal conductivity.

Each partition cooling groove is provided with a larger open outer endand a smaller inner end, which enlarges the size of the channel andimproves the heat dissipation performance while ensuring the structuralstrength of the inner end of the partition wall.

The casing realizes the relative airtightness of the partition coolinggrooves and the liquid cooling channel, which facilitates the processingof the grooves and the channel, and improves the processing efficiencyand the heat dissipation efficiency of the channel.

The motor cooling groove is mainly used to dissipate the waste heatgenerated by the motor, and the controller cooling groove is mainly usedto dissipate the waste heat generated by the motor controller. Thepartition cooling grooves are located between the motor cooling grooveand the controller cooling groove. The liquid cooling scheme of theintegrated heat dissipation channel can improve the heat dissipationefficiency and the performance of the drive assembly.

The bearing and the resolver are both provided in the mounting hole, andthe bearing supports the rotor to rotate. The resolver is connected withthe rotor and can monitor the rotation state of the rotor. The resolveris located at the side closer to the controller mounting chamber,allowing it to be routed to the motor controller. By utilizing the spaceat the rear end in the axial direction of the motor, through thearrangement of the partition wall and the bearing, the rotor isrotatably provided in the motor mounting chamber, and the motorcontroller is provided in the controller mounting chamber. This designeffectively reduces the occupied space, improves the space utilization,and realizes the high integration of the drive assembly.

The chamber cover isolates the two chambers, thereby improving theoperation stability, and the signal connection terminal and the signalconnection socket are easy for wiring.

The three-phase terminal block is provided at the mounting hole, makingit easy to connect with the motor controller and the stator.

The first terminal portions are provided at the outer circumference ofthe bearing, which does not affect the mounting and positioning of therotor, thereby realizing the compact axial space arrangement of thedrive assembly.

In the structural arrangement of the terminal block body, the secondterminal portions and the resolver are all located in the wiring groove,thereby improving the space utilization and realizing a compact devicelayout.

Since the terminal block body is provided therein with the resolver, themagnetic ring is provided around the terminal block body to reduceelectromagnetic interference.

The liquid cooling channel of the housing communicates with thepartition cooling grooves of the partition wall. Therefore, the wasteheat of the bearing and the resolver can be quickly transferred from thepartition wall to the housing, thereby improving the heat conductionefficiency and the operating performance of the drive assembly. Thepotting glue improves the protection and heat conduction efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS Description of Drawings

FIG. 1 is a structural view of a drive assembly according to anembodiment of a drive assembly of the present disclosure;

FIG. 2 is a structural view of the drive assembly viewed from anotherperspective according to the embodiment of the drive assembly of thepresent disclosure;

FIG. 3 is an exploded view of the drive assembly according to theembodiment of the drive assembly of the present disclosure;

FIG. 4 is a structural view of a housing of the drive assembly showing amotor mounting chamber according to an embodiment of the drive assemblyof the present disclosure;

FIG. 5 is a structural view of a housing of the drive assembly showing acontroller mounting chamber according to the embodiment of the driveassembly of the present disclosure;

FIG. 6 is a structural view of a three-phase terminal block according tothe embodiment of the drive assembly of the present disclosure;

FIG. 7 is a structural view of the three-phase terminal block viewedfrom another perspective according to the embodiment of the driveassembly of the present disclosure;

FIG. 8 is an exploded view of the three-phase terminal block accordingto the embodiment of the drive assembly of the present disclosure;

FIG. 9 is a structural view of an outer circumferential wall of thehousing according to the embodiment of the drive assembly of the presentdisclosure;

FIG. 10 is a radial sectional view of the drive assembly at thepartition wall according to the embodiment of the drive assembly of thepresent disclosure;

FIG. 11 is an axial sectional view of the drive assembly at thethree-phase terminal block according to the embodiment of the driveassembly of the present disclosure;

FIG. 12 is a structural view of the three-phase terminal block and amotor controller according to the embodiment of the drive assembly ofthe present disclosure;

FIG. 13 is an exploded view of the three-phase terminal block and themotor controller according to the embodiment of the drive assembly ofthe present disclosure;

FIG. 14 is an exploded view of power transistor related devicesaccording to the embodiment of the drive assembly of the presentdisclosure;

FIG. 15 is an axial sectional view of the drive assembly at a powertransistor according to the embodiment of the drive assembly of thepresent disclosure;

FIG. 16 is an exploded view of a laminated busbar assembly according tothe embodiment of the drive assembly of the present disclosure;

FIG. 17 is a structural view of the motor controller with a main circuitboard removed according to the embodiment of the drive assembly of thepresent disclosure;

FIG. 18 is a structural view of the drive assembly with a cover removedaccording to the embodiment of the drive assembly of the presentdisclosure;

FIG. 19 is an exploded view of the motor controller and a connectingassembly according to the embodiment of the drive assembly of thepresent disclosure; and

FIG. 20 is an axial sectional view of the drive assembly according tothe embodiment of the drive assembly of the present disclosure.

The present disclosure is described in further detail below withreference to the drawings and embodiments.

DETAILED DESCRIPTION Implementations of the Present Disclosure

Embodiment of Drive Assembly:

Referring to FIGS. 1 to 3, the drive assembly includes a housing 1, acover 18, a casing 14, a motor controller 3, a bearing 17, a rotor 16,and a stator 15. Referring to FIGS. 4, 5 and 11, the housing 1 iscylindrical, and the housing 1 is provided therein with a chamber alongan axial direction of the housing 1. An inner wall of the housing 1 isprovided with a partition wall 11 along a radial direction of thehousing, and the partition wall 11 divides the chamber into a motormounting chamber 121 and a controller mounting chamber 122. Thepartition wall 11 is provided with a mounting hole 111 at a centerthereof along the axial direction of the housing 1, and the partitionwall 11 is provided with a mounting ring wall 112 extending toward themotor mounting chamber 121 at an outer circumference of the mountinghole 111. The mounting ring wall 112 and the partition wall 11 form amounting step within the mounting ring wall 112. The bearing 17 (itsstructure not specifically shown) is provided inside the mounting ringwall 112. Three connecting holes 113 and three inserting holes 114penetrate through the partition wall 11. Each connecting hole 113 has adiameter larger than that of each inserting hole 114. The threeconnecting holes 113 and the three inserting holes 114 are distributedalternately and evenly at intervals outside the bearing 17. The mountingring wall 112 is provided with a first collision avoidance groove 116 ateach connecting hole 113. The first collision avoidance groove 116 isarc-shaped and concaved toward the bearing 17. The partition wall 11 isprovided with three second collision avoidance grooves 115 on a firstend wall facing the motor mounting chamber 121. Each of the secondcollision avoidance grooves 115 extends in a direction inclined to aradial direction. The extending directions of two adjacent secondcollision avoidance grooves 115 form an acute angle (preferably 60°).The respective second collision avoidance grooves 115 extend from therespective connecting holes 113 toward an inner wall of the housing 1and the stator 15. The respective second collision avoidance grooves 115have a width that is the same as the diameter of the respectiveconnecting holes 113. The cover 18 covers the controller mountingchamber 122 and is fixedly connected with the housing 1.

In the controller mounting chamber 122 opposite to the motor mountingchamber 121, the partition wall 11 is provided with a positioning ringwall 117 extending toward the controller mounting chamber 122 at theouter circumference of the mounting hole 111. The positioning ring wall117 is located on a second end wall of the partition wall 11 facing thecontroller mounting chamber 122. The partition wall 11 is provided withthree mounting platforms 118 at an outer side of the positioning ringwall 117. The mounting platforms 118 each have a B-shaped cross-section,and the mounting platforms 118 are each hollow inside. Each mountingplatform 118 is located between two adjacent connecting holes 113. Afixing hole 119 is provided on an edge of a mounting platform 118 closerto the positioning ring wall 117, and three fixing holes 119 are evenlydistributed along a circumferential direction of the positioning ringwall 117.

Referring to FIGS. 6 to 8 and FIG. 11, a three-phase terminal block 2includes a terminal block body 21 and three single-phase terminals 22.The terminal block body 21 extends substantially in a cylindrical shape,and the terminal block body 21 is made of an insulating material such asplastic by injection molding. The terminal block body 21 includes acentral ring portion 211, three outer connecting portions 212 and threeinner connecting portions 213. The central ring portion 211 is annularand encircles a wiring groove 241. An outer circumference of the centralring portion 211 is provided with an annular flange. The central ringportion 211 and the annular flange form an annular mounting step 242. Amagnetic ring 28 is provided on the mounting step 242. The innerconnecting portions 213 each extend in the wiring groove 241 from thecentral ring portion 211. The three inner connecting portions 213 areevenly arranged along a circumference of the central ring portion. Theouter connecting portions 212 each extend away from the wiring groove241 from the central ring portion 211. The three outer connectingportions 212 protrude axially and radially outwards, and the three outerconnecting portions 212 are evenly arranged along the circumference ofthe central ring portion. One outer connecting portion 212 and one innerconnecting portion 213 are arranged along a same radial section.

The single-phase terminals 22 each extend axially, and each of thesingle-phase terminals 22 includes a connecting portion 221, a firstterminal portion 222 and a second terminal portion 223. The connectingportion 221 is connected between the first terminal portion 222 and thesecond terminal portion 223. The connecting portion 221 is bent towardthe wiring groove 241 in a direction from the first terminal portion 222to the second terminal portion 223. The first terminal portion 222 andthe second terminal portion 223 each are cylindrical and provided with aconnection hole. The single-phase terminals 22 passes through thecentral ring portion 211. The first terminal portions 222 are located atthe outer connecting portions 212, and the second terminal portions 223are located at the inner connecting portions 213. The three single-phaseterminals 22 are respectively connected with the central ring portion211, the three outer connecting portions 212 and the three innerconnecting portions 213 through a secondary injection molding process.The central ring portion 211, the outer connecting portions 212 and theinner connecting portions 213 surround the single-phase terminals 22 toachieve the purpose of insulation. The first terminal portion 222 andthe second terminal portion 223 are respectively located on two endsalong an axial direction of the terminal block body 21. On a projectionplane of the terminal block body 21 perpendicular to an axial directionof the terminal block body 21, projection planes of the three firstterminal portions 222 perpendicular to the axial direction are locatedat an outer circumference of a projection plane of the wiring groove 241perpendicular to the axial direction, and the three second terminalportions 223 are located inside the wiring groove 241. Each of the outerconnecting portions 212 is provided with a shielding wall 214 at anouter circumference of the respective first terminal portions 222, andthe shielding wall 214 extends in an arc shape.

One first terminal portions 222 is further provided with a terminal clip23. The terminal clip 23 is provided with a U-shaped clip portion 232and a connection hole that is configured to connect and fit with thefirst terminal portion 222. Three mounting portions 26 are furtherprovided in the wiring groove 241. The three mounting portions 26 arecircumferentially evenly distributed, and are respectively locatedbeside the second terminal portions 223.

Referring to FIGS. 9 and 10, an outer wall of the housing 1 is providedwith a liquid cooling channel. The liquid cooling channel includes amotor cooling groove 139 and a controller cooling groove 132. The motorcooling groove 139 is located on an outer wall of the motor mountingchamber 121, and the controller cooling groove 132 is located on anouter wall of the controller mounting chamber 122. The motor coolinggroove 139 and the controller cooling groove 132 are respectivelyprovided therein with heat-conducting posts to increase the heatconduction area. Multiple partition cooling grooves 133 are provided inthe partition wall 11. The multiple partition cooling grooves 133 aredistributed in a circumferential direction of the partition wall 11.Each partition cooling groove 133 is provided with an opening at anouter end, and is closed inside the partition wall 11. The partitioncooling grooves 133 are located between the motor cooling groove 139 andthe controller cooling groove 132. Outer ends of the partition coolinggrooves 133, an outer end of the motor cooling groove 139 and an outerend of the controller cooling grooves 132 communicate with each other.

The multiple partition cooling grooves 133 each extend toward thebearing 17. Since the first terminal portions 222 and the insertingholes 114 need to be avoided, the partition cooling grooves 133 havedifferent depths. The outer ends of the partition cooling grooves 133and an outer end of the liquid cooling channel are open. The casing 14covers the outer wall of the housing 1, and the casing 14 is locatedoutside the partition cooling grooves 133 and the liquid coolingchannel, so that the outer ends of the partition cooling grooves 133,the outer end of the motor cooling groove 139 and the outer end of thecontroller cooling groove 132 communicate with each other. The outer endof each partition cooling groove 133 is provided with mounting grooves1321 on two sides.

A guide baffle 134 is provided in each of the partition cooling grooves133. The guide baffle 134 is a flat plate which extends inwards. Anouter end of the guide baffle 134 is provided with a guide groove 1343.The guide groove 1343 is close to the outer end of the partition coolinggroove 133. The guide baffle 134 is provided with locking protrusions,namely locking portions 1341, on two edges of the guide groove 1343. Thelocking portions 1341 are provided in the mounting grooves and fit withthe mounting grooves to achieve position limiting. A certain circulationspace is reserved between an inner end portion 1344 of the guide baffle134 and an inner end portion of the partition cooling groove 133. Theguide baffle is provided with a through hole 1342 at a center thereof,and the through hole 1342 is configured to circulate a cooling liquid.When the cooling liquid flows through the outer ends of the partitioncooling grooves 133, the through holes 1342 and the guide grooves 1343of the guide baffles 134 guide the cooling liquid into the inner ends ofthe partition cooling grooves 133, thereby improving the heatdissipation efficiency.

A channel opening 135 is provided on the outer wall of the housing 1 atthe controller mounting chamber 122. The channel opening 135 isconnected with a connection module 137. The connection module 137 isconfigured to connect a liquid cooling circulation system. A connectionport 136 is provided on the outer wall of the housing 1 at the motormounting chamber 121, and both the connection port 136 and the channelopening 135 communicate with the liquid cooling channel.

Referring to FIGS. 11 and 20, the drive assembly further includes achamber cover 25 and a resolver 27. The resolver 27 is provided in themounting hole 111, and the resolver 27 is located at one end of thebearing 17 closer to the controller mounting chamber 122. A rotatingshaft of the rotor 16 is connected with the resolver 27, and theresolver 27 is electrically connected with the motor controller 3. Thechamber cover 25 covers the mounting hole 111 and is connected with thepartition wall 11. The chamber cover 25 is provided with a removablebaffle at a center thereof. The chamber cover 25 covers the resolver 27at a side of the controller mounting chamber 122. The chamber cover 25is provided with a connection groove, which is provided therein with asignal connection terminal 252. A connection port of the resolver 27 isconnected with the signal connection terminal 252. A main circuit board43 is provided with a signal connection socket 435 corresponding to thesignal connection terminal 252. The signal connection terminal 252 islocated between single-phase connection terminals and positive electrodeand negative electrode connection terminals. The signal connectionterminal 252 can be easily connected with the signal connection socket435.

When the three-phase terminal block 2 is provided on the partition wall11, the three first terminal portions 222 pass through the connectingholes 113 respectively. The central ring portion 211 of the three-phaseterminal block 2 is sleeved outside the positioning ring wall 117, thechamber cover 25 and the resolver 27. That is, the resolver 27 islocated inside the wiring groove 241, and the magnetic ring 28 islocated outside the resolver 27.

In this way, the three-phase terminal block 2 is mounted to one end ofthe mounting hole 111 closer to the controller mounting chamber 122.Screws pass through the mounting portions 26 and the positioning holes251 of the chamber cover 25 to be connected with the fixing holes 119.The three first terminal portions 222 are relatively scattered along anouter circumference of the bearing 17, and the three second terminalportions 223 are relatively concentrated. The three single-phaseterminals 22 are connected between the motor controller 3 and the stator15. On a projection plane of the bearing 17 perpendicular to the axialdirection, the projection plane of the three single-phase terminals 22,the three connecting holes 113, and the three inserting holes 114, whichare perpendicular to the axial direction, are located between theprojection plane of the bearing 17 perpendicular to the axial directionand a projection plane of the stator 15 perpendicular to the axialdirection.

The stator 15 is provided with a winding, which is provided with leadsand terminals. The terminals of the stator are located in the secondcollision avoidance grooves 115 and connected with the first terminalportions 222. Potting glue 19 is filled in a space formed by themounting ring wall 112, the partition wall and the inner wall of thehousing. Thus, the potting glue 19 covers the three first terminalportions 222, the three connecting holes, the three fixing holes, theterminals of the stator, and one end of the winding closer to thepartition wall. This design improves protection and waterproofness, andachieves certain waste heat conduction and device fixation.

Referring to FIGS. 12 and 13, the three-phase terminal block 2 isprovided in a center of the motor controller 3. The motor controller 3includes a circuit board assembly, multiple capacitors 45, multiplepower transistors 34, a holding member 32, a positioning frame 33 and amounting shell 31. The circuit board assembly may adopt a conventionallaminated copper clad circuit, etc. In this embodiment, the circuitboard assembly is a laminated busbar assembly 4. The laminated busbarassembly 4 includes the main circuit board 43, a positive electrodeconnection plate 41, a negative electrode connection plate 42, and athree-phase connection plate assembly 44. The main circuit board 43 isprovided with a copper clad circuit, a circuit element and a pad to forma control circuit.

Referring to FIGS. 14, 15 and 5, the motor controller 3 is provided inthe motor mounting chamber 121. An inner wall of the controller mountingchamber 122 is provided with multiple heat-conducting surfaces 125. Themultiple heat-conducting surfaces 125 are flat surfaces, and theheat-conducting surfaces 125 are connected along a circumferentialdirection of the inner wall of the controller mounting chamber 122 insequence. A collision avoidance slot 126 is provided between twoadjacent heat-conducting surfaces 125. The housing 1 is provided with aring wall 124 in the controller mounting chamber 122. A power transistormounting groove 123 is formed between the ring wall 124 and the innerwall of the controller mounting chamber 122. The power transistormounting groove 123 is annular and extends axially.

The positioning frame 33 includes an annular base plate 331 and multiplespacers 333. The annular base plate 331 is a flat plate. A radial innerside of the annular base plate 331 is provided with bumps 332 that arecircumferentially evenly distributed. The multiple spacers 333 extendalong an axial direction of the positioning frame 33, and are providedon the annular base plate 331. The multiple spacers 333 are distributedalong a circumferential direction of the annular base plate 331. Oneside of the annular base plate 331 is adjacent to the partition wall 11,and the spacers 333 are located on the other side of the annular baseplate 331 with respect to the spacer wall 11. The spacers 333 each areprovided with a T-shaped radial section. The spacers 333 and the bumps332 are located on a same radial section of the housing 1.

The annular holding member 32 includes an annular base portion 321 andmultiple holding portions 322. The annular base portion 321 is anaxially extending sheet-like piece. The holding portions 322 arearc-shaped. The multiple holding portions 322 are distributed on theannular base portion 321 along a circumferential direction of theannular base portion 321. The holding portions 322 each include a fixedportion, an abutting portion, and a free portion. The fixed portion isconnected with the annular base portion 321. The abutting portionprotrudes from the fixed portion toward an outer side of the annularbase portion 321. The free portion is located at an end of the abuttingportion away from the fixed portion. The abutting portion is locatedbetween the fixed portion and the free portion. The abutting portion isarc-shaped, and protrudes away from the annular base portion 321 towardan outer side of the housing 1. The abutting portion also protrudestoward the inner wall of the housing 1 along the radial direction of thehousing 1, so the fixed portion and the free portion are both located ata side of the abutting portion closer to an inner side thereof. Twoadjacent holding portions 322 form a device holding group. A first slot323 is provided between the two adjacent holding portions 322 of thedevice holding group. The first slot 323 extends along an axialdirection of the holding member 32. One device holding group holds onepower transistor 34. A second slot 324 is provided between two adjacentdevice holding groups. The second slot 324 extends along the axialdirection of the holding member 32. A length of the second slot 324along the axial direction of the holding member 32 is greater than alength of the first slot 323 along the axial direction of the holdingmember 32.

The positioning frame 33, the multiple power transistors 34 and theholding member 32 are arranged in the power transistor mounting groove123. The annular base plate 331 of the positioning frame 33 is locatedat a bottom of the power transistor mounting groove 123, and themultiple power transistors 34 are arranged along a circumferentialdirection of the controller mounting chamber 122. Heat-conducting sheets35 are located between packages of the power transistors 34 and theheat-conducting surfaces 125. The packages of the power transistors 34are connected with the heat-conducting sheets 35, and theheat-conducting sheets 35 are connected with the heat-conductingsurfaces 125. The heat-conducting sheets 35 may be made of silica gel ora ceramic. Every one spacer 333 is located between two adjacent powertransistors 34, and the power transistors 34 are each limited by thespacers 333 on two sides. The holding portions 322 are closer to aninner side of the ring wall 124 relative to the inner wall of thehousing 1. The holding portions 322 abut between the ring wall 124 andthe power transistors 34, and exert an elastic force toward an outsideof the housing 1 on the power transistors 34. The second slots 324 fitswith the bumps 332 for position limiting. The main circuit board 43 iscircular. Pins of the power transistors 34 pass through an edge of themain circuit board 43 and are soldered with the main circuit board 43.

Referring to FIGS. 16 and 17, the mounting shell 31 is a bottomedcylinder. The mounting shell 31 is provided with an inner ring wall 312at a center thereof, and the inner ring wall 312 encloses a run-throughthird collision avoidance hole 3121. The mounting shell 31 is providedwith an outer ring wall 311 surrounding the inner ring wall 312, and anannular bottom 313 is provided between the outer ring wall 311 and theinner ring wall 312. The outer ring wall 311, the inner ring wall 312and the bottom 313 enclose a mounting and accommodating space. Thebottom 313 of the mounting shell 31 is provided with a positioning postassembly extending along an axial direction of the motor controller 3.The positioning post assembly includes multiple first positioning posts314 and multiple second positioning posts 315. The multiple firstpositioning posts 314 are distributed circumferentially, and themultiple second positioning posts 315 are also circumferentiallydistributed. The multiple second positioning posts 315 are locatedoutside the multiple first positioning posts 314 away from an axis ofthe mounting shell 31. Each of the first positioning posts 314 has adiameter smaller than that of each of the second positioning posts 315.The multiple first positioning posts 314 and the multiple secondpositioning posts 315 pass through the positive electrode connectionplate 41, the negative electrode connection plate 42 and the three-phaseconnection plate assembly 44.

Two adjacent first positioning posts 314 and two adjacent secondpositioning posts 315 which are respectively adjacent to the twoadjacent first positioning posts enclose a capacitor positioning space.A connecting line of one first positioning post 314 and one secondpositioning post 315 adjacent thereto passes through an axis of themounting shell 31. The multiple first positioning posts 314 and themultiple second positioning posts 315 are radially arranged. Onecapacitor 45 is located in the capacitor positioning space formed by thetwo first positioning posts 314 and the adjacent two second positioningposts 315 which are respectively adjacent to the two adjacent firstpositioning posts.

The mounting shell 31 is provided with three connection and fixingplatforms 317, which are located on a top of the inner ring wall 312 andlocated in the third collision avoidance hole 3121. The three connectionand fixing platforms 317 are evenly arranged along a circumferentialdirection of the third collision avoidance hole 3121. A receiving step316 is provided at an outer side of each connection and fixing platform317 away from the axis of the mounting shell 31, for receiving thepositive electrode connection plate 41 and fitting with a supportingplatform 418. Each connection and fixing platform 317 is provided with apositive electrode connection position 319 and a negative electrodeconnection position 318. The positive electrode connection position 319and the negative electrode connection position 318 are respectivelyprovided with connection nuts, and the two connection nuts are arrangedside by side. A fixing hole 3171 is provided beside the positiveelectrode connection position 319 or beside the negative electrodeconnection position 318 on each connection and fixing platform 317.

A top of the outer ring wall 311 of the mounting shell 31 is providedwith an outer flange 3111 protruding outward in a radial direction ofthe outer ring wall 311. The outer flange 3111 is annular. A bearingstep 3112 is provided between the outer flange 3111 and the outer ringwall 311. The bearing step 3112 is configured to receive the positiveelectrode connection plate 41, and multiple bumps 3113 are provided onan upper surface of the bearing step 3112.

The positive electrode connection plate 41 is a bottomed cylinder. Thepositive electrode connection plate 41 is entirely made of a metal. Thepositive electrode connection plate 41 is provided with a firstcollision avoidance hole 410 at a center thereof. An inner ring wall 413is provided at an outer circumference of the first collision avoidancehole 410 of the positive electrode connection plate 41. The positiveelectrode connection plate 41 is provided with an outer ring wall 412surrounding the inner ring wall 413. A bottom ring wall 414 is providedbetween the inner ring wall 413 and the outer ring wall 412 of thepositive electrode connection plate 41. The bottom ring wall 414 isconnected between the inner ring wall 413 and the outer ring wall 412.The bottom ring wall 414, the outer ring wall 412 and the inner ringwall 413 enclose an annular device accommodating space. The deviceaccommodating space is configured to accommodate the multiple capacitors45 such that the multiple capacitors 45 are distributedcircumferentially, and the positive electrode connection plate 41 isconfigured in the shape of an annular pot. An outer edge of the outerring wall 412 of the positive electrode connection plate 41 is providedwith a radially extending flange 4121. The flange 4121 is provided alonga circumferential direction of the outer ring wall 412. Multiplepositive electrode pins 411 are circumferentially arranged on the flange4121. The positive electrode pins 411 extend along the axial directionof the housing 1. A limiting groove 4122 is provided between twoadjacent positive electrode pins 411 on the flange 4121. Multiplelimiting grooves 4122 are evenly distributed along the circumferentialdirection. The bottom ring wall 414 is provided with multiple firstelectrical contacts 415, and the multiple first electrical contacts 415are distributed circumferentially. The first electrical contacts areformed by grooving in the bottom ring wall 414. The first electricalcontacts 415 are connected with positive electrodes of the capacitors45. The bottom ring wall 414 is further provided with multiplerun-through first positioning holes 416 and multiple run-through secondpositioning holes 417. The multiple first positioning holes 416 arecircumferentially evenly distributed, and the multiple secondpositioning holes 417 are also circumferentially evenly distributed. Themultiple first positioning holes 416 are located at an inner side of thefirst electrical contacts 415, and the multiple second positioning holes417 are located outside the first electrical contacts 415. The firstpositioning posts 314 pass through the first positioning holes 416, andthe second positioning posts 315 pass through the second positioningholes 417.

An end portion of the inner ring wall 413 closer to the negativeelectrode connection plate 42 is provided with supporting platforms 418,and the supporting platforms 418 are configured to receive the negativeelectrode connection plate 42. An inner edge of the supporting platform418 of the positive electrode connection plate 41 is provided withpositive electrode connection terminals 419. The positive electrodeconnection terminals 419 are bent. The positive electrode connectionterminals 419 extend axially and then radially. The positive electrodeconnection terminals 419 each are provided with a connection hole thatis located in the first collision avoidance hole 410.

The negative electrode connection plate 42 is a circular metal plate. Anouter edge of the negative electrode connection plate 42 is providedwith multiple negative electrode pins 421 in a circumferential directionof the negative electrode connection plate. The multiple negativeelectrode pins 421 extend axially. The outer edge of the negativeelectrode connection plate 42 is further provided with multiple firstpin collision avoidance grooves 422. The multiple first pin collisionavoidance grooves 422 are circumferentially evenly arranged. One firstpin collision avoidance groove 422 is provided between two adjacentnegative electrode pins 421, such that the negative electrode pins 421and the first pin collision avoidance grooves 422 are alternatelydistributed. The negative electrode connection plate 42 is provided withmultiple second electrical contacts 425. The multiple second electricalcontacts 425 are circumferentially distributed. The second electricalcontacts 425 are formed by grooves in the negative electrode connectionplate 42. The second electrical contacts 425 are connected with negativeelectrodes of the capacitors 45. The negative electrode connection plate42 is further provided with multiple run-through first positioning holes424 and multiple run-through second positioning holes 423. The multiplefirst positioning holes 424 are circumferentially evenly distributed,and the multiple second positioning holes 423 are also circumferentiallyevenly distributed. The multiple first positioning holes 424 are locatedat an inner side of the second electrical contacts 425, and the multiplesecond positioning holes 423 are located outside the second electricalcontacts 425. The first positioning posts 314 pass through the firstpositioning holes 424, and the second positioning posts 315 pass throughthe second positioning holes 423. The negative electrode connectionplate 42 is provided with a second collision avoidance hole 426 at acenter thereof. The first collision avoidance hole 410 communicates withthe second collision avoidance hole 426. An inner edge of the secondcollision avoidance hole 426 of the negative electrode connection plate42 is provided with negative electrode connection terminals 427. Thenegative electrode connection terminals 427 are bent. The negativeelectrode connection terminals 427 extend axially and then radially. Thenegative electrode connection terminals 427 each are provided with aconnection hole that is located in the second collision avoidance hole426.

The three-phase connection plate assembly 44 includes three single-phaseconnection plates 441. The three single-phase connection plates 441 eachare arcuate metal plates, and of course they may also be arranged in afan shape. An outer edge of each of the single-phase connection plate441 is provided with multiple single-phase pins 442 in a circumferentialdirection of the each of the single-phase connection plate. The multiplesingle-phase pins 442 extend axially. The outer edge of each of thesingle-phase connection plates 441 is further provided with second pincollision avoidance grooves. The second pin collision avoidance groovesinclude positive electrode collision avoidance grooves 443 and negativeelectrode collision avoidance grooves 444. Two single-phase pins 442,one positive electrode collision avoidance groove 443 and one negativeelectrode collision avoidance groove 444 are circumferentially arrangedin sequence. An inner edge of each of the single-phase connection plates441 is provided with a single-phase connection terminal 445. Thesingle-phase connection terminal 445 is provided with a connection hole.The single-phase connection plates 441 each are provided with twocollision avoidance grooves 447 and three positioning holes 446. The twocollision avoidance grooves 447 are located at the inner edge of theeach of the single-phase connection plates 441, and the threepositioning holes 446 are circumferentially distributed on a radialouter side of the collision avoidance grooves 447. The threesingle-phase connection plates 441 are coplanar, so their outer edgesform a circle-like outline, and their inner edges enclose a connectionspace.

When the laminated busbar assembly 4, the multiple capacitors 45 and themounting shell 31 are assembled, the positive electrode connection plate41 is mounted in the mounting shell 31, and the multiple capacitors 45are mounted to the positive electrode connection plate 41. The negativeelectrode connection plate 42 is provided on the positive electrodeconnection plate 41, and then the device accommodating space and thecapacitors 45 are covered. The negative electrode connection plate 42 issupported by the bearing step 3112, and the bumps 3113 fit with thelimiting grooves 4122 for position limiting. The capacitors 45 areconnected between the positive electrode connection plate 41 and thenegative electrode connection plate 42. The three single-phaseconnection plates 441 are placed on the negative electrode connectionplate 42. Thus, the first positioning posts 314 pass through the firstpositioning holes 416, the first positioning holes 424 and the collisionavoidance grooves 447 in sequence, and the second positioning posts 315pass through the second positioning holes 417, the second positioningholes 423 and the positioning holes 446 in sequence. Referring to FIGS.18 and 19, the main circuit board 43 is mounted on the threesingle-phase connection plates 441. The main circuit board 43 isprovided with connection holes corresponding to the positions of thefirst positioning posts 314 and the second positioning posts 315. Thelaminated connection is achieved by screws. That is, the main circuitboard 43, the three-phase connection plate assembly 44, the negativeelectrode connection plate 42, the capacitors 45 and the positiveelectrode connection plate 41 are sequentially laminated and connected.Three insulating layers are provided between the three-phase connectionplate assembly 44 and the negative electrode connection plate 42, andthe shapes of the three insulating layers are matched with thesingle-phase connection plates. An insulating layer may also be providedbetween the negative electrode connection plate 42 and the positiveelectrode connection plate 41, and an insulating layer may also beprovided between the main circuit board 43 and the three-phaseconnection plate assembly 44. The positive electrode pins 411 passthrough the first pin collision avoidance grooves 422 and the positiveelectrode collision avoidance grooves 443 and are connected to a pad ofthe main circuit board 43. The negative electrode pins 421 pass throughthe negative electrode collision avoidance grooves 444 and are connectedto the pad of the main circuit board 43. The single-phase pins 442 passthrough the main circuit board 43 and are connected to the pad of themain circuit board 43. The multiple positive electrode pins 411, themultiple negative electrode pins 421 and the multiple single-phase pins442 are arranged along a same circumferential direction. Of course, apositive electrode collision avoidance groove 443 and a negativeelectrode collision avoidance groove 444 may also form an integratedsecond pin collision avoidance groove, such that the positive electrodepins pass through the first pin collision avoidance grooves and thesecond pin collision avoidance grooves, and the negative electrode pinspass through the second pin collision avoidance grooves. Of course, thelamination positions of the three-phase connection plate assembly, thenegative electrode connection plate and the positive electrodeconnection plate are adjustable. For example, the pot-shaped connectionplate may also be the negative electrode connection plate, and thepositive electrode connection plate is provided on the pot-shapednegative electrode connection plate. That is, in the above embodiment,the electric polarities of the positive electrode connection plate 41and the negative electrode connection plate 42 are reversed.

In addition, the first collision avoidance hole 410, the secondcollision avoidance hole 426 and the third collision avoidance hole 3121overlap and communicate with each other. Projection planes of theconnection and fixing tables 317, the three positive electrodeconnection terminals 419, the three negative electrode connectionterminals 427, and the three single-phase connection terminals 445,which are perpendicular to the axial direction, are located inside aprojection plane of the second collision avoidance hole 426 or the thirdcollision avoidance hole 3121 perpendicular to the axial direction. Thepositive electrode connection terminals 419 are located on the positiveelectrode connection positions 319 and may be connected with thepositive electrode connection positions 319 by screws. The negativeelectrode connection terminals 427 are located on the negative electrodeconnection positions 318 and may be connected with the negativeelectrode connection positions 318 by screws. The positive electrodeconnection terminals 419, the negative electrode connection terminals427 and the single-phase terminals 445 are distributed circumferentiallyin sequence. The bent positive electrode connection terminals 419 fitwith the inner edge of the second collision avoidance hole 426 and theconnection and fixing platforms 317, for position limiting. The negativeelectrode connection positions 318 fit with the connection and fixingplatforms 317, for position limiting. The fixing holes 3171 at one sideof the respective negative electrode connection positions 318 arefixedly connected with the main circuit board. The motor controllerfurther includes three Hall elements 46. One Hall element 46 is providedat one single-phase connection terminal 445. Pins of the Hall element 46are also electrically connected with the main circuit board.

Referring to FIGS. 18 and 19 in combination with 17 and 20, when themotor controller 3 in the above state is mounted in the controllermounting chamber 122, the third collision avoidance hole 3121 is sleevedoutside the central ring portion 211 and the magnetic ring 28. Thepositions of the second terminal portions 223 are aligned with thepositions of the single-phase connection terminals 445 so as tofacilitate the screw connection. The second terminal portions 223 passthrough the respective Hall elements 46. The mounting shell 31 ismounted inside the ring wall 124 and fits therewith for positionlimiting. Monitoring sensors such as temperature sensors may be mountedin the motor mounting chamber. Wirings of the sensors are passed throughthe respective inserting holes 114 to be electrically connected with themotor controller. The power transistors 34 surround the main circuitboard 43 and are close to and surround an outer circumference of themounting shell 31. In addition, the controller cooling groove 132surrounds the power transistors 34, so as to achieve rapid heatconduction.

The main circuit board 43 is provided with a connection position 431, acontrol circuit position 432, a first soldering position 433, and asecond soldering position 434. The control circuit position 432, thefirst soldering position 433 and the second soldering position 434 arerespectively configured in a ring shape. The connection position 431 islocated in a center of the main circuit board 43. The control circuitposition 432 surrounds the connection position 431. The first solderingposition 433 surrounds the control circuit position 432. The secondsoldering position 434 surrounds the first soldering position 433. Thesecond soldering position 434 is located at an outermost edge of themain circuit board 43. Projection planes of the positive electrodeconnection terminals 419, the negative electrode connection terminals427 and the single-phase connection terminals 445, which areperpendicular to the axial direction, are located inside a projectionplane of the connection position 431 perpendicular to the axialdirection. The main circuit board 43 is provided with run-throughcollision avoidance holes corresponding to the positions of the positiveelectrode connection terminals 419, the negative electrode connectionterminals 427, and the single-phase terminals 445. The positiveelectrode connection terminals 419, the negative electrode connectionterminals 427 and the single-phase connection terminals 445 pass throughthe corresponding collision avoidance holes. The single-phase connectionterminals 445 are electrically connected with the main circuit board 43.The multiple positive electrode pins 411, the multiple negativeelectrode pins 421 and the multiple single-phase pins 442 areelectrically connected with the main circuit board 43 at the firstsoldering position 433. The multiple power transistors 34 are providedat an outer circumference of the main circuit board 43 and areelectrically connected with the main circuit board 43 at the secondsoldering position 434. The multiple power transistors 34 are evenlydistributed along the same circumferential direction of the main circuitboard 43. The multiple power transistors 34 are circumferentiallyarranged and located outside the three-phase connection plate assembly44, the negative electrode connection plate 42, and the positiveelectrode connection plate 41 along a radial direction thereof.

The multiple positive electrode pins 411, the multiple negativeelectrode pins 421 and the multiple single-phase pins 442 are arrangedalong the circumferential direction of the main circuit board 43. Twoadjacent single-phase pins 442 form a single-phase bridge arm pin group.One single-phase bridge arm pin group, one positive electrode pin 411,and one negative electrode pin 421 are cyclically arranged in acircumferential direction of the laminated busbar assembly in sequence.A control circuit is provided at the control circuit position 432. Acopper clad circuit is formed at a position of the control circuit, anda corresponding inverter circuit and a required circuit component aresoldered with tin. The projection planes of the capacitors 45perpendicular to the axial direction are located inside the projectionplane of the control circuit position 432 perpendicular to the axialdirection.

Referring to FIG. 9, a circumferential wall of the housing 1 located atthe controller mounting chamber 122 is provided with a run-throughconnecting hole 138 along a radial direction of the housing. The driveassembly further includes a connecting assembly 5. The connectingassembly 5 includes a connecting sleeve 53, a positive electrodeconnecting plate 52 and a negative electrode connecting plate 51. Thepositive electrode connecting plate 52 and the negative electrodeconnecting plate 51 are each sheet-like. An inner connecting terminalportion of the positive electrode connecting plate 52 includes apositive electrode connecting base portion 523 and three positiveelectrode connecting portions 524. The three positive electrodeconnecting portions 524 are connected at an outer edge of the positiveelectrode connecting base portion 523. The three positive electrodeconnecting portions 524 are circumferentially evenly distributed at theouter edge of the positive electrode connecting base portion 523. Thepositive electrode connecting portions 524 each are provided with aconnection hole. An inner connecting terminal portion of the negativeelectrode connecting plate 51 includes a negative electrode connectingbase portion 513 and three negative electrode connecting portions 514.The three negative electrode connecting portions 514 are connected at anouter edge of the negative electrode connecting base portion 513. Thethree connecting portions 514 are circumferentially evenly distributedat the outer edge of the negative electrode connecting base portion 513.The negative electrode connecting portions 514 each are provided with aconnection hole. The positive electrode connecting plate 52 and thenegative electrode connecting plate 51 each are provided with an outerconnecting terminal portion on an outer circumferential wall of thehousing 1. A straight plate portion 521 is provided between the outerconnecting terminal portion 522 of the positive electrode connectingplate 52 and one positive electrode connecting portion 524. A straightplate portion 511 is provided between the outer connecting terminalportion 512 of the negative electrode connecting plate 51 and onenegative electrode connecting portion 514. The straight plate portion511 and the straight plate portion 521 pass through the connecting hole138 side by side.

In addition, the positive electrode connecting base portion 523 and thenegative electrode connecting base portion 513 are laminated on the maincircuit board 43 along the axial direction of the housing 1. Thenegative electrode connecting base portion 513 is located between thepositive electrode connecting base portion 523 and the motor controller.A first collision avoidance recess 525 is formed between the positiveelectrode connecting base portion 523 and the positive electrodeconnecting portions 524. The negative electrode connecting base portion513 is located in the first collision avoidance recess 525. The threepositive electrode connection terminals 419 and the three negativeelectrode connection terminals 427 are located on a same radial plane.This facilitates the connection of the positive electrode connectingportions 524 with the positive electrode connection terminals 419 andthe connection of the negative electrode connecting portions 514 withthe negative electrode connection terminals 427. In order to improve theprotection, the connecting sleeve 53 covers the positive electrodeconnecting plate 52 and the negative electrode connecting plate 51 bysecondary injection molding, and the positive electrode connecting plate52 and the negative electrode connecting plate 51, except for the outerconnecting terminal portions, the negative electrode connecting portionsand the positive electrode connecting portions, are wrapped. Inaddition, the connecting sleeve 53 is located in the controller mountingchamber 122, and the connecting sleeve 53 is in an interference fit withthe connecting hole 138.

Of course, the following configuration may also be adopted to achievethe objectives of the present disclosure. The positive electrodeconnecting base portion 523 is located between the negative electrodeconnecting base portion 513 and the motor controller. A second collisionavoidance recess is formed between the negative electrode connectingbase portion 513 and the negative electrode connecting portions 514, andthe positive electrode connecting base portion 523 is located in thesecond collision avoidance recess.

The connecting assembly 5 further includes a connecting box 55. Theconnecting box 55 is connected with the outer circumferential wall ofthe housing 1 located at the controller mounting chamber 122. Aninterior of the connecting box 55 communicates with the controllermounting chamber 122 through the connecting hole 138. The outerconnecting terminal portion of the positive electrode connecting plate52 and the outer connecting terminal portion of the negative electrodeconnecting plate 51 extend into the connecting box 55. The driveassembly is provided with a mounting orientation, and is mounted to avehicle in the state shown in FIG. 18. Thus, in a vertical direction ofthe mounting orientation, the housing 1 includes a top portion and abottom portion. In the vertical direction of the mounting orientation,the connecting hole 138 is located between the top portion and thebottom portion of the housing. Therefore, the connecting box 55 is alsolocated between the top portion and the bottom portion of the housing,and the connecting box 55 is located on a lateral side, so as to reducethe occupied space in the vertical direction. Preferably, the straightplate portion 511 and the straight plate portion 521 run at an acuteangle (for example, 45°) or a right angle with the vertical direction.

In the prior art, the rear end in an axial direction of the motor isgenerally provided with a fixing structure or a heat dissipationstructure, which is generally implemented by multiple cylindricalstructures. The present disclosure utilizes the space at the rear end inthe axial direction, and arranges components such as the motorcontroller, the capacitors and the power transistors in the controllermounting chamber at the rear end in the axial direction. The presentdisclosure optimizes the connection structure of the rear end in theaxial direction through the circuit arrangement of the laminated busbar,the terminal block and the annular arrangement of the power transistors,etc. In this way, the present disclosure reduces the overall occupiedspace of the circuit devices and effectively utilizes the space at therear end in the axial direction. In addition, compared to the existingmotor assembly, the present disclosure maintains the axial dimension ofthe drive assembly, and also maintains the radial dimension of the driveassembly in the vertical direction by optimized connection through theconnecting hole. Overall, the present disclosure enables a highlyintegrated drive assembly.

Embodiment of Vehicle:

The vehicle includes the drive assembly as described above. The driveassembly may be integrated with or without a transmission. The vehiclemay be a new energy electric car, a new energy electric bus, a newenergy electric truck, a new energy electric cleaning vehicle, a newenergy electric rail vehicle, a new energy electric flying vehicle, anew energy electric shipping vehicle, etc.

It can be seen from the above that, by utilizing the space at the rearend in the axial direction of the motor, through the arrangement of thepartition wall and the bearing, the rotor is rotatably provided in themotor mounting chamber, and the motor controller is provided in thecontroller mounting chamber. Three single-phase terminals pass throughthe partition wall and are connected between the motor controller andthe stator. The projection planes of the three single-phase terminalsperpendicular to the axial direction are located between the projectionplane of the bearing perpendicular to the axial direction and theprojection plane of the stator perpendicular to the axial direction.When the terminals of the stator and the single-phase terminals areconnected, that is, when the rotor is not mounted, an operating space isreserved between the bearing and the stator. This facilitates theconnection of the terminals of the stator and the single-phaseterminals. The motor controller is provided at the rear end in an axialdirection of the motor, which effectively reduces the occupied space,improves the space utilization, and realizes the high integration of thedrive assembly. The bearing is stably provided in the mounting ringwall, which improves the operational stability of the motor, and thethree single-phase terminals are located at the outer circumferentialwall of the mounting ring wall, which makes it convenient for themounting and positioning of the terminals of the stator. The firstcollision avoidance grooves can position the terminals of the stator,and optimize the layout space, thereby improving the connecting easinessand reliability. The fixing holes are configured to attach and fix themotor controller. The connecting holes and the fixing holes are locatedbetween the bearing and the stator, which is convenient for disassemblyand assembly. The second collision avoidance grooves can accommodate theleads and terminals of the stator, thereby optimizing the layout space.

In addition, considering that the stator has a three-phase winding, thethree single-phase terminals are arranged at the outer circumference ofthe terminal block body to connect the terminals of the statorcorrespondingly, thereby optimizing the wiring layout. In addition, thespace formed by the three single-phase terminals can accommodatecomponents such as the bearing, thereby improving the compactness of thestructure layout. The first terminal portions and the second terminalportions are respectively located outside or inside the wiring groove.The first terminal portions are circumferentially scattered to avoid thebearing, and the second terminal portions are circumferentiallyconcentrated to achieve centralized connection of the motor controllerand improve the circuit layout utilization of the motor controller.Through secondary injection molding, the central ring portion, the outerconnecting portions and the inner connecting portions are wrapped aroundthe single-phase terminals, thereby improving the protection between thetwo terminal portions. The central ring portion can also be used for themounting and positioning of other devices. The outer connecting portionsand the first terminal portions are located outside the central ringportion in an axial direction and protrude outwards in a radialdirection to avoid the bearing or the resolver and improve the spaceutilization. The shielding walls can play a role of positioning andlimiting for wiring to improve the connection stability, and also play arole of insulating the terminals of the stator. The three-phase terminalblock is fixedly mounted in the drive assembly through the mountingportions, and one mounting portion is located beside one second terminalportion, which is convenient for assembly and disassembly. Since theterminal block body can be provided with devices such as the resolver,the magnetic ring is provided around the terminal block body to reduceelectromagnetic interference.

The potting glue is filled on the end surface of the partition wallfacing the motor mounting chamber, such that the potting glue covers thefirst terminal portions that are connected with the terminals of thestator. This realizes potting and sealing of the first terminal portionsand the terminals of the stator, thereby effectively improving theprotection and efficiently conducting the waste heat to the partitionwall. The bearing is stably provided in the mounting ring wall, whichimproves the operational stability of the motor, and the threesingle-phase terminals are located on the outer circumferential wall ofthe mounting ring wall, which makes it convenient for the mounting andpositioning of the terminals of the stator. In addition, the pottingglue is accurately filled between the mounting ring wall, the partitionwall and the inner wall of the housing, such that the waste heatgenerated by the bearing can also be conducted through the potting glue.The fixing holes are used to connect and fix the motor controller, andthe connecting holes are used for the single-phase terminals to passthrough, so as to improve the isolation between the motor mountingchamber and the controller mounting chamber and avoid mutualinterference. The second collision avoidance grooves can accommodate theleads and terminals of the stator, thereby optimizing the layout space.In addition, the terminals and the leads of the stator, and an end ofthe winding are positioned by the potting glue.

The resolver is connected with the rotor and can monitor the rotationstate of the rotor. The resolver is located at the side closer to thecontroller mounting chamber, allowing it to be routed to the motorcontroller. The chamber cover isolates the two chambers. The connectiongroove is easy for wiring, thereby improving the operation stability.

The liquid cooling channel of the housing communicates with thepartition cooling grooves of the partition wall. Therefore, the wasteheat of the bearing and some other components can be quickly transferredfrom the partition wall to the housing, thereby improving the heatconduction efficiency and the operating performance of the driveassembly. Since the partition wall needs to support the bearing andother devices, the partition wall needs a certain structural space.Thus, the partition cooling grooves are distributed circumferentially toimprove the heat conduction efficiency of the partition wall withoutaffecting the strength. The guide baffles are configured to guide thecooling liquid at the outer side from outer ends to inner ends of thepartition cooling grooves, and the mounting grooves make it easy for themounting and positioning of the guide baffles. The guide grooves atouter ends and the through holes in centers are designed to adjust theflow direction of the cooling liquid, so as to realize sufficient heatexchange and improve the thermal conductivity. Each partition coolinggroove is provided with a larger open outer end and a smaller inner end,which enlarges the size of the channel and improves the heat dissipationperformance while ensuring the structural strength of the inner end ofthe partition wall. The casing realizes the relative airtightness of thepartition cooling grooves and the liquid cooling channel, whichfacilitates the processing of the grooves and the channel, and improvesthe processing efficiency and the heat dissipation efficiency of thechannel. The motor cooling groove is mainly used to dissipate the wasteheat generated by the motor, and the controller cooling groove is mainlyused to dissipate the waste heat generated by the motor controller. Thepartition cooling grooves communicate with the motor cooling groove andthe controller cooling groove. Therefore, the liquid cooling scheme ofthe integrated heat dissipation channel improves the heat dissipationefficiency and the performance of the drive assembly. Since thepartition wall needs to support the bearing and other devices, thepartition wall needs a certain structural space. Thus, the partitioncooling grooves are distributed circumferentially to improve the heatconduction efficiency of the partition wall without affecting thestrength. The guide baffles are configured to guide the cooling liquidat the outer side from outer ends to inner ends of the partition coolinggrooves, so as to realize sufficient heat exchange and improve thethermal conductivity.

The multiple power transistors are circumferentially arranged andconnected with the inner wall of the controller mounting chamber. Thewaste heat of the power transistors can be efficiently conducted to theinterconnected controller cooling groove and motor cooling groove,realizing integrated liquid cooling and improving heat dissipationefficiency. Besides, using the inner circumferential wall as a heatconductor can effectively optimize the device layout of the motorcontroller, avoid the need for a heat conduction structure, andfacilitate the highly integrated design of the device. The powertransistors are turned on by time sharing in actual operation.Therefore, the distributed arrangement realizes time-sharing heatconduction at different positions, thereby further improving the heatconduction efficiency. The heat-conducting surfaces are closely adjacentto the packages of the power transistors, which increases the heatconduction area and improves the heat conduction efficiency. Thecollision avoidance grooves are easy for the processing of theheat-conducting surface, and a certain collision avoidance space isformed between two power transistors. The heat-conducting sheets may bemade of thermally conductive silicone or a thermally conductive ceramicplate, which improves the heat conduction efficiency between thepackages of the power transistors and the heat-conducting surfaces. Thepower transistor mounting groove positions and limits the powertransistors. The positioning frame provided in the power transistormounting groove limits the power transistors, so as to effectivelyimprove the mounting stability of the power transistors. This designimproves the performance stability of the drive assembly that is locatedin a severe vibration environment.

The three single-phase connection plates are coplanar and form acircle-like outline. The positive electrode connection plate, thenegative electrode connection plate and the three single-phaseconnection plates are laminated, and are electrically connected with themain circuit board through the pins at their respective outer edges, soas to realize the corresponding circuit connection. The laminatedstructure reduces the axial dimension and achieves a compact purpose,and the laminated structure is simple and is easy for assembly, therebyimproving assembly efficiency. The arrangement of the pins in the samecircumferential direction optimizes the wiring layout and the circuitlayout of the main circuit board. The collision avoidance grooves makeit easy for the pins to be arranged in the same circumferentialdirection, and can achieve the corresponding limiting purpose. Thecollision avoidance holes are centrally provided, and the arcuatesingle-phase connection plates in a circle form a connecting space at acenter. Thus, the projection planes of the positive electrode connectionterminals, the negative electrode connection terminals, and the threesingle-phase connection terminals, which are perpendicular to the axialdirection, are located inside the projection plane of the secondcollision avoidance hole perpendicular to the axial direction. Thepositive electrode connection terminals, negative electrode connectionterminals and single-phase connection terminals are centrally arranged,which is convenient for connection, and the pins are arrangedcircumferentially, which effectively optimizes the circuit wiringlayout.

The positive electrode connection plate is a bottomed cylinder, whichaccommodates the multiple capacitors and realizes effective positioningof the capacitors. In addition, the negative electrode connection plateplays the role of covering and positioning, which provides desiredsupport for the stable connection of the capacitors. The main circuitboard, the negative electrode connection plate, the multiple capacitorsand the positive electrode connection plate are laminated in sequence.The laminated structure reduces the axial dimension and achieves thecompact purpose, and the laminated structure is simple and is easy forassembly, improving assembly efficiency. The first collision avoidancehole is used for mounting, positioning and placement of terminals. Theannular device accommodating space is used to hold the multiplecapacitors, such that the multiple capacitors are distributedcircumferentially and well supported and positioned. The axiallyarranged electrical contacts are respectively electrically connectedwith the two ends of the capacitor to ensure the electrical connectionstability. The negative electrode connection plate is stably provided onthe supporting platform, and the positive electrode connection terminalsand the negative electrode connection terminals are located in thesecond collision avoidance hole. This design realizes the centralizedarrangement of terminals, optimizes the layout, and improves theconnection efficiency. The mounting shell and the positioning postassembly provide stable support and fixation for the main circuit board,the positive electrode connection plate, the negative electrodeconnection plate, and even the motor controller. The third collisionavoidance hole of the mounting shell is used for assembly andpositioning of other equipment. The connection and fixing platformsprovide stable support for the connection of the positive electrode andnegative electrode. The positioning posts provide support andpositioning for the main circuit board, the positive electrodeconnection plate and the negative electrode connection plate. Acapacitor positioning space is formed by four positioning posts, whichprovides stable support for the connection of the capacitors and ensuresthe stability of the motor controller. The radial arrangement of thefirst positioning posts and the second positioning posts is adapted tothe arrangement direction of the capacitors which are arrangedcircumferentially, thereby further positioning the capacitors andimproving the stability of the capacitors.

To hold the annularly arranged multiple power transistors at the sametime through the annular base portion and the circumferentiallydistributed holding portions, the holding member is placed in a presetposition, which realizes simple assembly and quick positioning. Themanufacturing, forming, assembling and positioning of the sheet-likeholding member are relatively simple. The abutting portions protrudeoutwards and are configured in an arc shape to provide a stable forcefor holding the power transistors. Two adjacent holding portions form adevice holding group for holding one power transistor. One first slotmaintains the same holding force of two holding portions, and one secondslot separates two adjacent device holding groups. This design enablesthe device holding groups to have a large offset space, and with thehelp of the annular base portion, the device holding groups can wellhold the power transistors.

The connection position, the control circuit position, the firstsoldering position, and the second soldering position are sequentiallyarranged from a center to an outer side of the main circuit board alonga radial direction of the main circuit board. The control circuitposition, the first soldering position and the second soldering positionare respectively configured in a ring shape. The connection terminalsare centrally arranged, and the central control circuit has a relativelylarge space. The annular circuit layout improves the structuralcoordination with the drive assembly.

The positive electrode connecting plate and the negative electrodeconnecting plate pass through the circumferential wall along the radialdirection, making full use of the space in the horizontal direction andreducing the space occupied in the vertical direction or the axialdirection. The sheet-like connecting plates are easy for positioning andmounting, and further facilitate the layout of the axial space. Thearrangement of the three positive electrode connection terminals and thethree negative electrode connection terminals facilitates the annularcircuit layout of the motor controller. Correspondingly, the connectingplates are each provided with three connecting portions in acircumferential direction. The connecting base portions are used forbearing and connection, and provide stable support and fixation for theconnecting plates through triangular positioning. The laminatedarrangement improves the compactness of the structural arrangement. Inorder to solve the interference problem caused by the laminatedarrangement, collision avoidance recesses are provided. Through thereasonable structural arrangement, the positive electrode connectingplate and the negative electrode connecting plate are laminated withoutinterfering with each other. The insulation design of the connectingsleeve improves the protection and safety of the connecting plate. Theconnecting box provided on the radial outer circumferential wallfacilitates the connection of the positive electrode and negativeelectrode of the battery without opening the motor mounting chamber. Theoutlet direction of the positive electrode connecting plate and thenegative electrode connecting plate is designed based on the mountingorientation of the drive assembly. In order to shorten the verticaldimension such that the vehicle has more vertical space at the driveassembly, the connecting holes are located between the top portion andthe bottom portion of the housing, and the positive electrode connectingplate and the negative electrode connecting plate are inclined to thevertical direction.

INDUSTRIAL APPLICABILITY

The laminated busbar assembly, the motor controller, the drive assemblyand the vehicle of the present disclosure are suitable for the field ofnew energy. The present disclosure utilizes the space at the rear end inthe axial direction of the motor, and through the arrangement of thepartition wall and the bearing, the rotor is rotatably provided in themotor mounting chamber, while the motor controller is provided in thecontroller mounting chamber. By laminating the busbar and the devices,the present disclosure effectively reduces the occupied space, improvesthe space utilization, and realizes high integration.

1. A drive assembly with annularly arranged power transistors,comprising a housing, a motor controller, a rotor, and a stator, whereinthe housing is cylindrical, and is provided therein with a chamber alongan axial direction of the housing; an inner wall of the housing isprovided with a partition wall along a radial direction of the housing,the partition wall divides the chamber into a motor mounting chamber anda controller mounting chamber; the rotor is provided in the motormounting chamber; the stator is provided in the motor mounting chamber,and is located outside the rotor; and the motor controller is providedin the controller mounting chamber; an outer wall of the housing isprovided with a liquid cooling channel; the liquid cooling channelcomprises a motor cooling groove and a controller cooling groove thatcommunicate with each other; and the motor cooling groove is located onan outer wall of the motor mounting chamber, and the controller coolinggroove is located on an outer wall of the controller mounting chamber;the motor controller comprises a circuit board assembly and multiplepower transistors; the multiple power transistors are provided at anouter circumference of the circuit board assembly, and are electricallyconnected with the circuit board assembly; the multiple powertransistors are evenly distributed along a circumferential direction ofthe controller mounting chamber; packages of the multiple powertransistors are connected with an inner wall of the controller mountingchamber; and the controller cooling groove surrounds the powertransistors; the housing is provided with a ring wall in the controllermounting chamber; an annular power transistor mounting groove is formedbetween the ring wall and the inner wall of the controller mountingchamber; and the multiple power transistors are located in the powertransistor mounting groove; and the drive assembly further comprises aholding member; the holding member comprises an annular base portion andmultiple holding portions; the multiple holding portions are distributedon the annular base portion in a circumferential direction of theannular base portion; the holding member is located in the powertransistor mounting groove; and the holding portions abut between thering wall and the power transistor mounting groove.
 2. The driveassembly according to claim 1, wherein the inner wall of the controllermounting chamber is provided with multiple heat-conducting surfaces,which are connected along a circumferential direction of the inner wallof the controller mounting chamber in sequence, and are respectivelyconnected with the packages of the power transistors.
 3. The driveassembly according to claim 2, wherein a collision avoidance groove isprovided between every two adjacent heat-conducting surfaces.
 4. Thedrive assembly according to claim 2, wherein heat-conducting sheets arelocated between the packages of the power transistors and theheat-conducting surfaces.
 5. The drive assembly according to claim 1,wherein the drive assembly further comprises a positioning frame; thepositioning frame comprises an annular base plate and multiple spacers;the multiple spacers are provided on the annular base plate, and extendalong an axial direction of the positioning frame; the multiple spacersare distributed along a circumferential direction of the annular baseplate; the positioning frame is located in the power transistor mountinggroove; and every one spacer is located between two adjacent powertransistors.
 6. The drive assembly according to claim 5, wherein thespacer is provided with a T-shaped radial section.
 7. A vehicle,comprising the drive assembly according to claim
 1. 8. The driveassembly according to claim 2, wherein the drive assembly furthercomprises a positioning frame; the positioning frame comprises anannular base plate and multiple spacers; the multiple spacers areprovided on the annular base plate, and extend along an axial directionof the positioning frame; the multiple spacers are distributed along acircumferential direction of the annular base plate; the positioningframe is located in the power transistor mounting groove; and every onespacer is located between two adjacent power transistors.
 9. The driveassembly according to claim 3, wherein the drive assembly furthercomprises a positioning frame; the positioning frame comprises anannular base plate and multiple spacers; the multiple spacers areprovided on the annular base plate, and extend along an axial directionof the positioning frame; the multiple spacers are distributed along acircumferential direction of the annular base plate; the positioningframe is located in the power transistor mounting groove; and every onespacer is located between two adjacent power transistors.
 10. The driveassembly according to claim 4, wherein the drive assembly furthercomprises a positioning frame; the positioning frame comprises anannular base plate and multiple spacers; the multiple spacers areprovided on the annular base plate, and extend along an axial directionof the positioning frame; the multiple spacers are distributed along acircumferential direction of the annular base plate; the positioningframe is located in the power transistor mounting groove; and every onespacer is located between two adjacent power transistors.
 11. The driveassembly according to claim 8, wherein the spacer is provided with aT-shaped radial section.
 12. The drive assembly according to claim 9,wherein the spacer is provided with a T-shaped radial section.
 13. Thedrive assembly according to claim 10, wherein the spacer is providedwith a T-shaped radial section.
 14. A vehicle, comprising the driveassembly according to claim
 2. 15. A vehicle, comprising the driveassembly according to claim
 3. 16. A vehicle, comprising the driveassembly according to claim
 4. 17. A vehicle, comprising the driveassembly according to claim
 5. 18. A vehicle, comprising the driveassembly according to claim
 6. 19. A vehicle, comprising the driveassembly according to claim
 8. 20. A vehicle, comprising the driveassembly according to claim 9.